Question

(g) 4u2 - 8u - 21 factorization​

Answer 1

Answer:

$(2u + 3)(2u - 7)$

Step-by-step explanation:

$= 4 {u}^{2} - 8u - 21 \\ = 4 {u}^{2} - 14u + 6u - 21 \\ = 2u(2u - 7) + 3(2u - 7) \\ (2u + 3)(2u - 7)$

Answer 2

Step-by-step explanation:

4u2-8u-21

4u2-(14u-6u)-21

4u2-14u+6u-21

2u(2u-7)+3(2u-7)

(2u+3) (2u-7)

2u=-3

u=-3/2

2u=7

u=7/2