Question

Simplify. (4x2 + 7x - 5) - (3x2 - 2x - 4)
A. x2 + 9x - 1
B. -x2 + 5x + 1
C. -x2 - 9x - 9
D. 7x2 + 5x - 9

Answer 1

The Answer Is A .

Answer 2

distribute the (-) in the second expression

(4x2 + 7x - 5) - (3x2 - 2x - 4)= 4x2 + 7x - 5 - 3x2 + 2x + 4

now combine like terms to get

x2 + 9x - 1

Answer 3

4x^2 - 3x^2 + 7x + 2x - 5 + 4
x^2 + 9x - 1
so A.

Answer 4

4x^2-3x^2=x^2
7x-(-2x)= 7x+2x= 9
-5-(-4)=-5+4=-1
x^2+9-1