Question

By adding x- x² - 7x + 3 to 3 + 7x + x² - x² , we get

(a) 3 (b) -2x (x² - x² - 7x + 3) (c) 6 (d) 2 (x² -x²³ -7x + 3)​

Answer 1

x - x² - 7x + 3 + 3 + 7x + x² - x²

= -x² + x + 6

= - (x²-x-6)

= - (x+2)(x-3)

Jadi x = 3 atau -2