(b+4)²+4(b+4)-21 factorise it and give full and correct answer
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(b+4)²+4(b+4)-21 factorise it and give full and correct answer
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Answer:
b^2 +11+12b
Step-by-step explanation:
(b +4)^2 +4(b+4) -21
= (b^2+4^2+2*4*b) + 4b +16 -21
= b^2 +16+8b +4b +16 -21
=b^2 +32-21 +12 b
= b^2 +11 +12b
Answer:
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