solve (3x + 2y)² + (3x - 2 y)²
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Answer:
(3x + 2y)² + (3x - 2 y)²
(9x^2+12xy+4y^2)+(9x^2-12xy+4y^2)
9x^2+4y^2+9x^2+4y^2
18x^2+8y^2
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Answered by
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Answer:
(3x+2y)^2 + (3x-2y)^2. {a2+b2 = (a+b)2-2ab}
= (3x+2y+3x-2y)^2 - 2(3x+2y)(3x-2y)
= (6x)^2 - 2(9x^2 - 4y^2)
= 36x^2 - 18x^2 + 8y^2
= 18x^2 + 8y^2
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