Đáp án:
Giải thích các bước giải:
(8x−3)(3x+2)−(4x+7)(x+4)+(2x+1)(1−5x)=−33(8x−3)(3x+2)−(4x+7)(x+4)+(2x+1)(1−5x)=−33
pt⇔3x(8x−3)+2(8x−3)−(x(4x+7)+4(4x+7))+(2x+1)−5x(2x+1)+33=0pt⇔3x(8x−3)+2(8x−3)−(x(4x+7)+4(4x+7))+(2x+1)−5x(2x+1)+33=0
⇔24x2−9x+16x−6−(4x2+7x+16x+28)+2x+1−10x2−5x+33=0⇔24x2−9x+16x−6−(4x2+7x+16x+28)+2x+1−10x2−5x+33=0
⇔24x2−9x+16x−6−4x2−7x−16x−28+2x+1−10x2−5x+33=0⇔24x2−9x+16x−6−4x2−7x−16x−28+2x+1−10x2−5x+33=0
⇔10x2−19x=0⇔x(10x−19)=0⇔10x2−19x=0⇔x(10x−19)=0
⇒[x=010x−19=0⇒[x=010x−19=0⇒⎡⎣x=0x=1910