Question

(2x+3)²-5(2x+3)-14 factorise​

Answer 1

Let 2x + 3y = a

then (2x + 3y)2 – 5(2x + 3y) – 14

= a2 – 5a – 14

= a2 – 7a + 2a – 14

= a(a – 7) + 2(a – 7)

= (a – 7) (a + 2)

= (2x + 3y – 7) (2x + 3y + 2)

Answer 2

Answer:

-6x-20

Step-by-step explanation:

= 4x+9-5(2x+3)-14

= 4x+9-10x-15-14

= -6x+9-15-14

= -6x+9-29

= -6x-20

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