Factorise :7(a+2b)^2-21(a+2b)
Answers
Answered by
4
Answer:
7(a+2b)^2-21(a+2b)
7(a+2b)(a+2b-3a-6b)
=7(a+2b)(-2a-4b)
=-14(a+2b)(a+2b)
=-14(a+2b)^2
Step-by-step explanation:
Answered by
1
Answer:
(a+2b)(7a+14b-21)
Step-by-step explanation:
(a+b)(7(a+2b)-21)
= (a+2b)(7a+14b-21)
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