−4(x2+5)=(−x+7)(4x−9)+5
x=?
To solve this equation, we'll follow these steps:
- Step 1: Expand and simplify the right-hand side.
- Step 2: Set the equation to zero by moving all terms to one side.
- Step 3: Simplify to obtain a standard quadratic equation.
- Step 4: Use the quadratic formula to find the possible solutions for x.
Now, let's work through each step:
Step 1:
Expand the right-hand side:
(−x+7)(4x−9)=−x(4x)−x(−9)+7(4x)−7(9)
= −4x2+9x+28x−63
Considering both sides: −4(x2+5)=−4x2+9x+28x−63+5.
Step 2:
Simplify further by calculating:
−4x2−20=−4x2+37x−58.
Step 3:
Move all terms to one side to achieve zero on the right-hand side:
−4x2−20+4x2−37x+58=0
Simplifying, we get: 37x+38=0.
Step 4:
Since the x2 terms cancel, it's actually a linear equation:
37x=−38.
Solving for x, we divide both sides by 37:
x=37−38=−1371.
Therefore, the solution to the problem is x=1371.