Question

evaluate the product (y2 - 6) (y2 + 7)​

Answer 1

(y2-6) (y2+7)

• y2-6×y2+7
• y4-6+7
• y11-6
• y5 is the answer

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Answer 2

Answer:

(y^2-6)(y^2+7)

X = Y^2 , A = -6 , B = 7 By identity (x-a) (x-b)

(Y^2)^2 + (-6+7)y^2 - (-6) × 7

Y^4 + Y^2 - 42