simplify/evaluate (3x+7y)²
Answers
Answered by
1
Answer:
9(x^2)+42xy+49(y^2)
Step-by-step explanation:
(3x+7y)^2
(3x+7y)*(3x+7y)
3x*3x+3x*7y+7y*3x+7y*7y
9(x^2)+2(21xy)+49(y^2)
9(x^2)+42xy+49(y^2)
Answered by
1
Answer:
(3x+7y)^2
(3x + 7y)^2
(3x+7y) (3x+7y)
3x(3x+7y) + 7y (3x+7y)
9x^2 + 21 xy + 7y (3x + 7y)
9x^2 + 21 xy + 21 xy +49y ^2
9x^2 +42xy + 49y^2
therefore (3x+7y)^2 is simplified and the simplification is
9x^2 + 42xy + 49 y^2
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