Examples with solutions for Difference of squares: Complete the missing numbers

Exercise #1

Fill in the missing element to obtain a true expression:

(x+)(x)=x2121 (x+_—)\cdot(x-_—)=x^2-121

Video Solution

Answer

11

Exercise #2

Fill in the missing element to obtain a true expression:

(+3)(3)=x29 (_—+3)\cdot(_—-3)=x^2-9

Video Solution

Answer

x x

Exercise #3

Fill in the missing element to obtain a true expression:

x264=(x)(+x) x^2-64=(x-_—)(_—+x)

Video Solution

Answer

8

Exercise #4

Fill in the missing element to obtain a true expression:

x249=(x)(x+) x^2-49=(x-_—)\cdot(x+_—)

Video Solution

Answer

7

Exercise #5

x26=(x)(x+) x^2-6=(x-_—)\cdot(x+_—)

Video Solution

Answer

6 \sqrt{6}

Exercise #6

Fill in the missing element to obtain a true expression:

x236=(x)(+x) x^2-36=(x-_—)\cdot(_—+x)

Video Solution

Answer

6

Exercise #7

Fill in the missing element to obtain a true expression:

2x2=2(x4)(x+4) 2x^2-_{_—}=2(x-4)\cdot(x+4)

Video Solution

Answer

32