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MATHEMATICS

JAMB 2013 - Question 6

Mathematics 2013 JAMB Past Questions - Question 6: Multiply (x + 3y + 5) by (2x2 + 5y + 2)E. 2x3 + 2yx2 + 10xy + 10y2 + 31y + 5x2 + 10

Multiply (x + 3y + 5) by (2x2 + 5y + 2)E. 2x3 + 2yx2 + 10xy + 10y2 + 31y + 5x2 + 10

A: 2x^2 + 3yx^2 + 10xy + 15y^2 + 13y + 10x^2 + 2x + 10

B: 2x^3 + 6yx^2 + 5xy + 15y^2 + 31y + 10x^2 + 2x + 10

C: 2x^3 + 6xy^2 + 5xy + 15y^2 + 12y + 10x^2 + 2x + 10

D: 2x^2 + 6xy^2 + 5xy + 15y^2 + 13y + 10x^2 + 2x + 10

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Correct Answer

Explanation

(x+3y+5)(2x^2+5y+2)= 2x^3+5xy+2x+6yx^2+15y^2+6y+10x^2+25y+10= 2x^3+5xy+2x+6yx^2+15y^2+31y+10x^2+10