Find :(8a-9b)(8a-9b) –(7a+9b)(7a+9b)
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(8a-9b)(8a-9b) –(7a+9b)(7a+9b)
= (8a-9b)²- (7a+9b)²
= (8a-9b+7a+9b)(8a-9b-7a-9b)
= 15a(a-18b)
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pls mark as brainlist answer
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