Question

sendo A = 3x² + 7x, = -4x² = 5x -2 e C=6x+1, detremine A-B-C:

Answer 1

A = 3x² + 7x
B = - 4x² + 5x - 2
C = 6x + 1

= A - B - C
= 3x² + 7x - ( - 4x² + 5x - 2) - (6x + 1)
= 3x² + 7x + 4x² - 5x + 2 - 6x - 1
= 3x² + 4x² + 7x - 5x - 6x+ 2 - 1
= 7x² - 4x + 1