Question

a) (x + 2)(x + 3) = b)(2x - 5)(3x - 2) = c) (y + 6)(y- 6) = d) (xy-7)(xy + 6) =​

Answer 1

Resposta:

a) (x + 2)(x + 3) = x² + 3x + 2x + 6 = x² + 5x + 6

b)(2x - 5)(3x - 2) = 6x² - 4x - 15x + 10 = 6x² -19x + 10

c) (y + 6)(y- 6) = y² - 6y + 6y - 36 = y² - 36

d) (xy-7)(xy + 6) =​ x²y² + 6xy - 7xy - 42 = x²y² - xy - 42