4×(-1/2²)-3/2×(-2/5)
4×(-1/2²)-3/2×(-2/5)
(1-2²)+3²-4²+5²-6²+7²-8²+
-3²×(-3)² (-1/2)×(-2/3)×(-3/4)×(-4/5)
化简-(2a²+5)-(3a²-2)-2(-4a²-1)
(-2)²-(3-5)-根号4+2×(-3)
-2³÷4/9×(-2/3)²+(-0.8)-5×(-1/4)
3X(2X+1)=4X+2 (X-4)²=(5-2X)²
1)(3a²-2a+1)-(2a²+3a-5) 2)-二分之三x×(三分之二x²-2x+4
3x²-【5x-4(1/2x²-1)+5x²】,其中x=-3/2
因式分解(1)x²-5x+3(2)x²-2√2x-3(3)3x²+4xy-y²
①(根号5 +2)²-(2-根号5)² ②(x-1)²=4 ③3x²+5(2x+
计算(1)4×(-3)²+5×(-3)+7 (2)(-5)²-5²-2/3³+(