问题
解答题
计算题:(1)3(4x-3)-(5x-6)
(2)(25x2+15x3y-20x4)÷(-5x2)
答案
(1)3(4x-3)-(5x-6),
=12x-9-5x+6,
=7x-3;
(2)(25x2+15x3y-20x4)÷(-5x2),
=25x2÷(-5x2)+15x3y÷(-5x2)-20x4÷(-5x2),
=-5-3xy+4x2.
计算题:(1)3(4x-3)-(5x-6)
(2)(25x2+15x3y-20x4)÷(-5x2)
(1)3(4x-3)-(5x-6),
=12x-9-5x+6,
=7x-3;
(2)(25x2+15x3y-20x4)÷(-5x2),
=25x2÷(-5x2)+15x3y÷(-5x2)-20x4÷(-5x2),
=-5-3xy+4x2.