Find the following products and evaluate the results for x = - 1 and y = 2. (5+2x)(5-2x)(25-4x²)
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Step-by-step explanation:
(5+2x)(5-2x)(25-4x²)
={(5)²-(2x)²} (25-4x²)
=( 25-4x²) (25-4x²)
= (25-4x²)²
= (25)²+ (4x²)²-2*25*4x²
= 625 + 16x⁴ - 200x²
= 625 + 16(-1)⁴-200(-1)²
= 625 + 16 - 200
= 441
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