Question

Solve for x.

(x + 5)(x + 4) = 9x + 141

Answer 1

Answer:x=11 or x=-11

Step-by-step explanation: First, Use the FOIL method.

(x+5)(x+4)=9x+141

First:
`x^(2)`

Outer: 4x

Inner: 5x

Last: 5x4=20

Combine Like terms and write in standard form:
`x^(2)`+9x+20

Set up new equation:
`x^(2)`+9x+20=9x+141

Subtract 9x from both sides:
`x^(2)`+20=141

Subtact 20 from both sides:
`x^(2)`=121

Sqr root 121:
`√(121)` =11

Remeber a sqr root of a positive number can be positive and negative so x= 11 or -11

Answer 2

Answer: x=11 or x=-11

Explanation: