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Question

Find the product:

(2x2 − 5y2)(x2 + 3y2)

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Solution

(2x2-5y2)(x2 +3y2) =2x2×(x2 +3y2) -5y2×(x2 +3y2)=(2x2×x2 +2x2×3y2) -(5y2×x2 +5y2×3y2)=2x4 +6x2y2 -5y2x2 -15y4=2x4 +x2y2 -15y4

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