Adding, subtracting and simplifying polynomials are an important skills in algebra and maths in general. Grade 7 maths multiple choice questions on adding and subtracting polynomials with answers are presented in this page.
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To add polynomials in algebra, we group like terms and simplify.
Example 1 (2 x + 5) + (4x + 6) = (2x + 4x) + (5 + 6) put like terms together inside parentheses = 6x + 11 simplify Example 2 (x2 - 6 x - 9) + (- 5 x2 + 9 x + 2) = (x2 - 5 x2) + (-6 x + 9 x) +(-9 + 2) put like terms together inside parentheses = - 4 x2 + 3 x - 7 simplify To subtract polynomials, change signs of all terms of the polynomial preceded by the minus sign and change the subtraction into addition; group like terms and then simplify. Example 3 (2 x y + x + 5) - (3 x y - 2x + 7) = (2 x y + x + 5) + (- 3 x y + 2x - 7) = (2 x y - 3 x y) + (x + 2x) + (7 - 7) = - x y + 3x Multiple Choice Questions
Answers to the Above Questions
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