Answer:
The answer is (8x²- 25x +7).
Step-by-step explanation:
Given A, B, C are the polynomials.
A = 3x - 4
B = x + 7
C = x² + 2
We have to find the value of A²-(B + C)
By putting the values of A, B and C the expression will be
(3x - 4)²- (x + 7 + x² + 2) = (9x²+16-24x) - (x² + x + 9)
9x² - x² -24x - x + 16 - 9 = 8x² - 25x + 7
So the simplest form of the expression is (8x² - 25x + 7)
