expand each expression using algebraic identities.
a) (5d-6)^2
b) (4x+y)^2
URGENT!!! plz
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Answer:
a) 25d + 36 - 60d
b) 16x + y^2 + 8xy
Step-by-step explanation:
a) (5d-6)^{2}
= (a-b)^2 = a^2 + b^2 - 2ab
= 5d^2 + 6^2 - 2 x 5d x 6
= 25d +36 - 60d
b) (4x+y)^2
= (a+b)^2 = a^2 + b^2 + 2ab
= 4x^2 + y^2 + 2 x 4x x y
= 16x + y^2 + 8xy
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