(x^2 + 5x -7 )(x^2 - 5x + 7)
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expert36:
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answer is x^2-(5x-7)2
Answered by
16
Answer : x⁴ - (5x-7)²
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Solution :
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(x²+5x-7)(x²-5x+7)
=> [ x²+(5x-7)][x²-(5x-7)]
As we know that :
a²-b² = (a+b)(a-b)
Here, a = x² and b = (5x-7)
=> (x²)² - (5x-7)²
=> x⁴ - (5x-7)²
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