evaluate: √3^2+(7+3y)^2
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Answer:
√3^2 +(7+3y)^2
√9 + (7+3y)^2
3 + (7+3y)^2
3 + 49 + 2×7×3y + 9y^2
3 + 49 + 42y+ 9y^2
52 + 42y + 9y^2
Step-by-step explanation:
Calculate 3 to the power of 2 and get 9.
Calculate the square root of 9 and get 3.
(a+b)^2=a^2+2ab+b^2
Add 3 and 49 to get 52.
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