Question

(2x^2+5x)(2x^2+5x-19)+84

Answer 1

Let 2x² + 5x = a

×××××××××××××××

(a) (a - 19) + 84

a² - 19a + 84

a² - (12 + 7)a + 84

a² - 12a - 7a + 84

a(a - 12) - 7(a - 12)

(a - 12)(a - 7)

(2x² + 5x - 12)(2x² + 5x - 7)

[ 2x² + (8 - 3)x - 12] [ 2x² + (7 - 2)x - 7]

[ 2x² + 8x - 3x - 12] [ 2x² + 7x - 2x - 7]

[ 2x(x + 4) - 3(x + 4)] [ x(2x + 7) -1(2x + 7)]

(x + 4)(2x - 3)(2x + 7)(x - 1)


I hope this will help you

(-:

Answer 2

Step-by-step explanation:

hope it helps you....