Grade 8 - Mathematics 7.51 Polynomials Review Test

Q 1: Expand (5x+2y)^{2}. 25x^{2}-20xy+4y^{2} 25x^{2}+20xy+4y^{2} None of these 25x^{2}+20xy+2y^{2}

Q 2: Find the value of (58)^{2} using formula. 3354 3384 3364 3374

Q 3: Find the product of (2x+2y+2z) (4x^{2}+4y^{2}+4z^{2}-4xy-4yz-4xz). None of these 8x^{3}+8y^{3}+z^{3}-12xyz 8x^{3}+8y^{3}+z^{3}-24xyz 8x^{3}+8y^{3}-z^{3}-24xyz

Q 4: If a-b = 6 and ab = 91, find the value of a^{3}-b^{3}. 1854 1864 1844 1874

Q 5: If x - 1/x = 3, find the value of x^{2}+1/x^{2} and x^{4}+1/x^{4}. 113 117 119 115

Q 6: Find the product (7x+2y)(7x-2y). 49x^{2}+4y^{2} 49x^{2}-2y^{2} None of these 49x^{2}-4y^{2}

Q 7: Divide 6a^{4} by 2a^{2}. 3a^{} None of these 3a^{3} 3a^{2}

Q 8: Divide (x^{2}+7x+2) by (x+3). Quotient=(x-4) and Remainder=2 Quotient=(x-4) and Remainder=0 Quotient=(x+4) and Remainder=0 Quotient=(x+4) and Remainder=2

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