300²÷(152²-148²)
300²÷(152²-148²)
①(3x²y³)²÷(1/3xy²)²-7xy²
300²+(400-x)²等于多少?
ab²÷2c²×4cd÷-3a²b²
300²+(X+90)²=X²
[(a+b)²(a-b)²-3b²+3a²]÷(a²-b²)
1.a²-b²/a²b+ab²÷(1- ( a²+b²/2a
(3x²y³)²÷(1/3xy²)²-7x²y²
{x²-(y-z)²分之x²-y²}÷{(x-y)²-z²分
先化简再求值a²-b²/a²b+ab²÷(a²+b²/2ab
计算:(3xy)²(x²-y²)-(4x²y²)²÷8y
1.(a²-b²)÷(a-b) 2.(a²+2ab+b²)²÷(-a-