十字相乘法因式分解200题（含完整答案）

十字相乘法因式分解200题（含完整答案）十字相乘法因式分解200题（含完整答案）说明：分为基础二次三项式（x2+px+q）、\\二次项系数不为1（ax所有题目均为整式整数系数因式分解，结果分解到不能再分解；格式：题号原式→答案第一部分：基础型x2+bx+c（共100题）xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx2+2x+1（完全平方，xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxamytnupqsskkw2+12x+11zrrvv2−10v+9=(v−1)(v−9)

第二部分：进阶型ax2+bx+c(a≠1)101.2x2+3x+1=(2x+1)(x+1)

102.2x2+5x+2=(2x+1)(x+2)

103.2x2+7x+3=(2x+1)(x+3)

104.2x2−3x+1=(2x−1)(x−1)

105.2x2−5x+2=(2x−1)(x−2)

106.2x2−7x+3=(2x−1)(x−3)

107.2x2+x−1=(2x−1)(x+1)

108.2x2−x−1=(2x+1)(x−1)

109.2x2+3x−2=(2x−1)(x+2)

110.2x2−3x−2=(2x+1)(x−2)

111.3x2+4x+1=(3x+1)(x+1)

112.3x2+7x+2=(3x+1)(x+2)

113.3x2+8x+4=(3x+2)(x+2)

114.3x2−4x+1=(3x−1)(x−1)

115.3x2−7x+2=(3x−1)(x−2)

116.3x2−8x+4=(3x−2)(x−2)

117.3x2+2x−1=(3x−1)(x+1)

118.3x2−2x−1=(3x+1)(x−1)

119.3x2+x−2=(3x−2)(x+1)

120.3x2−x−2=(3x+2)(x−1)

121.4x2+5x+1=(4x+1)(x+1)

122.4x2+8x+3=(2x+1)(2x+3)

123.4x2−5x+1=(4x−1)(x−1)

124.4x2−8x+3=(2x−1)(2x−3)

125.4x2+3x−1=(4x−1)(x+1)

126.4x2−3x−1=(4x+1)(x−1)

127.4x2+4x−3=(2x+3)(2x−1)

128.4x2−4x−3=(2x−3)(2x+1)

129.5x2+6x+1=(5x+1)(x+1)

130.5x2−6x+1=(5x−1)(x−1)

131.5x2+4x−1=(5x−1)(x+1)

132.5x2−4x−1=(5x+1)(x−1)

133.6x2+5x+1=(2x+1)(3x+1)

134.6x2+7x+2=(2x+1)(3x+2)

135.6x2+11x+3=(2x+3)(3x+1)

136.6x2−5x+1=(2x−1)(3x−1)

137.6x2−7x+2=(2x−1)(3x−2)

138.6x2−11x+3=(2x−3)(3x−1)

139.6x2+x−1=(2x+1)(3x−1)

140.6x2−x−1=(2x−1)(3x+1)

141.6x2+5x−6=(2x+3)(3x−2)

142.6x2−5x−6=(2x−3)(3x+2)

143.8x2+6x+1=(2x+1)(4x+1)

144.8x2−6x+1=(2x−1)(4x−1)

145.8x2+2x−1=(2x+1)(4x−1)

146.8x2−2x−1=(2x−1)(4x+