去括号,合并同类项:2x-3(5x的2次方-x);
问题描述:
去括号,合并同类项:2x-3(5x的2次方-x);
答
=2x-15x²+3x
=5x-15x²
去括号,合并同类项:2x-3(5x的2次方-x);
=2x-15x²+3x
=5x-15x²