Question

Find the value of (A + B ) - (A - B) if
A = x2 - 7x + 9.
B = 3x2 + 5x - 6​

Answer 1

Hey mate, here is your solution

the value of A = x2 - 7x + 9

the value of B = 3x2 - 5x - 6

now put the value,

(A + B) - ( A - B)

( x2 - 7x + 9 + 3x2 + 5x - 6) - ( x2 - 7x + 9 - 3x2 +5x - 6)

( 4x2 -2x +3 ) - ( -2x2 -2x -3)

4x2 -2x + 3 + 2x2 + 2x + 3

6x2 + 6 is your answer mate