Evaluate (5²+3):2² = 5²+3:2²: Order of Operations Challenge

Question

Indicate whether the equality is true or not.

(52+3):22=52+3:22 (5^2+3):2^2=5^2+3:2^2

Video Solution

Solution Steps

00:00 Is the equation correct?
00:04 Let's start by solving the left side of the exercise
00:10 Let's solve 5 squared according to the laws of exponents
00:19 Let's solve 2 squared according to the laws of exponents
00:24 Let's substitute in our exercise
00:32 This is the solution for the left side of the exercise
00:38 Let's continue solving the right side of the exercise
00:44 Let's substitute the solution for 5 squared
00:48 Always solve exponents before division
00:52 Let's substitute the solution for 2 squared
00:55 Every division is actually a fraction so we'll convert it to a fraction
00:59 We got the solution for the right side of the exercise
01:03 According to our calculation, the equation is not correct
01:08 And this is the solution to our exercise

Step-by-Step Solution

In order to determine if the given equation is correct, we will simplify each expression on its sides separately,

This will be done while following the order of operations which states that exponents come before multiplication and division, which come before addition and subtraction, and that parentheses come before all of these,

A. Let's start with the expression on the left side of the given equation:

(52+3):22 (5^2+3):2^2 First, we'll simplify the expression in parentheses by calculating the numerical value of the exponent term and then perform the addition:

(52+3):22=(25+3):2228:22 (5^2+3):2^2 =\\ (25+3):2^2 \\ 28:2^2 Next, we'll calculate the numerical value of the divisor which is a term with an exponent (in fact, if we were to write the division as a fraction, this term would be in the denominator), then we'll perform the division:

28:22=28:4=7 28:2^2 =\\ 28:4=\\ 7 We have completed simplifying the expression on the left side of the given equation, let's summarize the simplification steps,

We got that:

(52+3):22=28:22=28:4=7 (5^2+3):2^2 =\\ 28:2^2 =\\ 28:4=\\ 7

B. Let's continue and simplify the expression on the right side of the given equation:

52+3:22 5^2+3:2^2 Similar to what we did in the previous part, we'll simplify the expression while following the order of operations,

Note that exponents come before multiplication and division which come before addition and subtraction, so we'll start by calculating the numerical value of the exponent term, which is the second term from the left, and calculate the numerical value of the second exponent term in this expression, which is the first term from the left, then we'll perform the division operation, and finally perform the addition:

52+3:22=25+3:4=25+34=2534 5^2+3:2^2 =\\ 25+3:4=\\ 25+\frac{3}{4} =\\ 25\frac{3}{4} In the final steps, since the result of the division operation isn't a whole number, we expressed its result as a simple fraction, and the addition result as a mixed number,

We have completed simplifying the expression on the right side of the given equation, this simplification was brief, so there's no need to summarize,

Now let's return to the original equation and substitute the results of simplifying the expressions detailed in A and B:

(52+3):22=52+3:227=2534 (5^2+3):2^2=5^2+3:2^2 \\ \downarrow\\ 7=25\frac{3}{4} Obviously:

72534 7\neq25\frac{3}{4} Therefore the given equation is incorrect, meaning we have a false statement,

Thus the correct answer is answer B.

Answer

Not true