Expand :
(i) (3x + 2y)²
(ii) (5a – b)²
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Answered by
3
Answer:
(3x+2y)^2= 9x^2+4y^2+12xy
(5a-b)^2= 25a^2+b^2-10ab
Answered by
7
(i) (3x + 2y)²
= (3x)² + 2(3x)(2y) + (2y)²
= 9x² + 12xy + 4y².
(ii) (5a - b)²
= (5a)² - 2(5a)(b) + (b)²
= 25a² - 10ab + b².
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