(1)99²-2.99² (2)80×3.5²+160×3.5×1.5+80×1.5² (3)181²-61²÷ 301²-181²
(4)5x-5y+5z (5)-5a²+25a-5a (6)2a(b+c)-3(b+c) (7)(ab+a)+(b+1)
(8)-4m³+16m³-28m (9)16x-25x³y² (10)36m²a-9m²a²-36m²
√32-3√1/2+√2
√12+√27/√3-√1/3×√12
√50+√30/√8-4
(√6-2√15)×√3-6√1/2
√2/3-4√216+43√1/6
√8+√30-√2
√40-5√1/10+√10
√2+√8/√2
√2/9+√50+√32
(1-√3)(√3+2)
(√8+3√6)÷√2-√3×√0.7
(4)5x-5y+5z (5)-5a²+25a-5a (6)2a(b+c)-3(b+c) (7)(ab+a)+(b+1)
(8)-4m³+16m³-28m (9)16x-25x³y² (10)36m²a-9m²a²-36m²
√32-3√1/2+√2
√12+√27/√3-√1/3×√12
√50+√30/√8-4
(√6-2√15)×√3-6√1/2
√2/3-4√216+43√1/6
√8+√30-√2
√40-5√1/10+√10
√2+√8/√2
√2/9+√50+√32
(1-√3)(√3+2)
(√8+3√6)÷√2-√3×√0.7
(-3+√6)(-3-√6)-(√3-1/√3)²
³√0.125-√3 1/16+³√(1-7/8)²
√2/3-√216+42√1/6
解方程√3 X-1=√2 X
求X
{√5 X-3√ Y=1}
{√3 X-√5 Y=2}
注:X全部不在根号内
√(1/2x)^2+10/9x^2
=√[1/(4x^2)+10/(9x^2)]
=√49/36x^2
若x>0,=7/(6x)
若x<0,=-7/(6x)
√a^4mb^2n+1
=√(a^2mb^n)^2+1
³√0.125-√3 1/16+³√(1-7/8)²
√2/3-√216+42√1/6
解方程√3 X-1=√2 X
求X
{√5 X-3√ Y=1}
{√3 X-√5 Y=2}
注:X全部不在根号内
√(1/2x)^2+10/9x^2
=√[1/(4x^2)+10/(9x^2)]
=√49/36x^2
若x>0,=7/(6x)
若x<0,=-7/(6x)
√a^4mb^2n+1
=√(a^2mb^n)^2+1
=a^2mb^n+1
√(4a^5+8a^4)(a^2+3a+2)
=√[4a^4(a+2)][(a+2)(a+1)]
=√[4a^4(a+2)^2(a+1)]
=2a^2(a+2)√(a+1)
. 3√(1/6)-4√(50)+30√(2/3)
答案3√(1/6)-4√(50)+30√(2/3)
= 3×√6/6-4×5√2+30×√6/3
=√6/2-20√2+10√6
2. (1-根号2)/2乘以(1+根号2)/2
题是这样的二分之一减根号2乘以二分之一加根号2
答案:(1-根号2)/2乘以(1+根号2)/2
=(1-√2)*(1-√2)/4
=(1-2)/4
=-1/4
√(4a^5+8a^4)(a^2+3a+2)
=√[4a^4(a+2)][(a+2)(a+1)]
=√[4a^4(a+2)^2(a+1)]
=2a^2(a+2)√(a+1)
. 3√(1/6)-4√(50)+30√(2/3)
答案3√(1/6)-4√(50)+30√(2/3)
= 3×√6/6-4×5√2+30×√6/3
=√6/2-20√2+10√6
2. (1-根号2)/2乘以(1+根号2)/2
题是这样的二分之一减根号2乘以二分之一加根号2
答案:(1-根号2)/2乘以(1+根号2)/2
=(1-√2)*(1-√2)/4
=(1-2)/4
=-1/4
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