8−xx−3=−(x−8)x−3=−(x−3)+5x−3=−1+5x−3" role="presentation" style="border:0px; box-sizing:border-box; direction:ltr; display:table-cell !important; float:none; font-size:15.82px; line-height:0; margin:0px; max-height:none; max-width:none; min-height:0px; min-width:18.131em; overflow-wrap:normal; padding:1px 0px; position:relative; text-align:center; white-space:nowrap; width:10000em; word-break:break-word; word-spacing:normal" class="MathJax_CHTML mjx-chtml mjx-full-width">
8−xx−3⇔B=8−22−3=−6" role="presentation" style="border:0px; box-sizing:border-box; direction:ltr; display:inline-block; float:none; font-size:15.82px; line-height:0; margin:0px; max-height:none; max-width:none; min-height:0px; min-width:0px; overflow-wrap:normal; padding:1px 0px; position:relative; white-space:nowrap; word-break:break-word; word-spacing:normal" class="MathJax_CHTML mjx-chtml">
Vậy B = -6 tại x = 2.
chết vậy B= -6 x=2
đổi lại Vậy A = -6 tại x = 2.