因式分解习题PPT
整式的乘法习题乘法公式习题因式分解习题答案及解析整式的乘法习题(a +2b)(a - 2b) = a^2 - 4b^2 (平方差公式)(3x -4y)(3...
整式的乘法习题乘法公式习题因式分解习题答案及解析整式的乘法习题(a +2b)(a - 2b) = a^2 - 4b^2 (平方差公式)(3x -4y)(3x + 4y) = 9x^2 - 16y^2 (平方差公式)(x +3)(x^2 - 3x + 9) = x^3 - 3x^2 + 9x + 3x^2 - 9x + 27 = x^3 + 27 (单项式乘以多项式)(2m -n)(m^2 + mn + n^2) = 2m^3 + 2m^2n + 2mn^2 - m^2n - n^3 - n^3 = 2m^3 - n^3 (单项式乘以多项式)(x +5)^2 = x^2 + 10x + 25 (完全平方公式)(2a -3b)^2 = 4a^2 - 12ab + 9b^2 (完全平方公式)(x -y + 1)^2 = x^2 - 2xy + y^2 + 2x - 2y + 1 (完全平方公式)(3m +2n - 1)^2 = 9m^2 + 12mn + 4n^2 - 6m - 4n + 1 (完全平方公式)A + B = 2x^2 + 3xy - 4x - 1 - x^2 + xy - 1 = x^2 + 4xy - 4x - 2A - B = 2x^2 + 3xy - 4x - 1 + x^2 - xy + 1 = 3x^2 + 2xy - 4x乘法公式习题(2019+ 1)(2019 - 1) = 2019^2 - 1^2 = 407604