56x22-6x22
56x37-56x22-56ⅹ5=什么? -
56x37-56x22-56ⅹ5 =56x(37-22-5)56x10 =560
56x37-56x22-56x5 =56x(37-22-5)=56x10 =560 如有帮助请采纳,如对本题有疑问可追问,Good luck!
56x37-56x22-56ⅹ5 =56x(37-22-5)56x10 =560
56x37-56x22-56x5 =56x(37-22-5)=56x10 =560 如有帮助请采纳,如对本题有疑问可追问,Good luck!
3x^6-3x^2=3x^2(x^4-1)=3x^2(x^2+1)(x+1)(x-1)x^2-4xy-1+4y^2=(x-2y)^2-1=(x-2y+1)(x-2y-1)25(x-2y)^2-4(2y-x)^2=(5x-10y+4y-2x)(5x-10y-4y+2x)=(3x-6y)(7x-14y)=21(x-2y)^2 2×56^2+8×56×22+2×44^2=2(56^2+2×56×44+44^2)=2是什么。
=可以用乘法交换率=(1x2x3x4x5x6x7x8x9x10)x(11x12x13x14x15x16x17x18x19x20)x(21x22x23x24x25x26x27x28x29x30)x(31x32x33x34x35x36x37x38x39x40)x(41x42x43x44x45x46x47x48x49x50)x(51x52x53x4x55x56x57x58x59x60)x(61x62x63x64x65x66x67x68x69x70)x(71x72x73x7还有呢?
数学题.解答 -
:125X64X25X5 =125*8*4*2*25*5 =(125*8)*(4*25)*(2*5)=1000000 345X2+345X3+345X5=345X(2+3+5)=345*10 97X125+3X125-20X125=( 97+3-20 )X125=90*125 56X37-56X22-56X5=( 56 )X(37-22-5 )56*(10)希望能够帮助你!数学终结者团队为您解答!
39) 930x22= 40) 946x19= 41) 56x491= 42) 93x455= 43) 77x850= 44) 87x476= 45) 508x77= 46) 377x63= 47) 65x128= 48) 570x59= 49) 576x40= 50) 38x882= 51.300-60= 52.560+70= 53、725-25= 54. 63090= 55. 780+30= 56. 420+70= 57.320-20= 58.868-62是什么。
初三一元二次方程题.要有答案. -
5、若方程kx2-6x+1=0有两个实数根,则k的取值范围是. 6、设x1、x2是方程3x2+4x-5=0的两根,则.x12+x22= . 7、关于x的方程2x2+(m2-9)x+m+1=0,当m= 时,两根互为倒数; 当m= 时,两根互为相反数. 8、若x1 = 是二次方程x2+ax+1=0的一个根,则a= , 该方程的另一个根x2 = . 9是什么。
(56)x^2+22x+105=0 答案:x1=-7 x2=-15 (57)x^2+19x-20=0 答案:x1=-20 x2=1 (58)x^2-7x+6=0 答案:x1=6 x2=1 (59)x^2+4x-221=0 答案:x1=13 x2=-17 (60)x^2+6x-91=0 答案:x1=-13 x2=7 (61)x^2+8x+12=0 答案:x1=-2 x2=-6 (62)x^2+7x-还有呢?
急需数学计算题,初一下册帮帮忙 -
-7x2+6x+13x2-4x-5x2=___.2y+(-2y+5)-(3y+2)=___.1. 3/7 × 49/9 - 4/3 2. 8/9 × 15/36 + 1/27 3. 12× 5/6 – 2/9 ×3 4. 8× 5/4 + 1/4 5. 6÷ 3/8 – 3/8 ÷6 6. 4/7 × 5/9 + 3/7 × 5/9 7. 5/2 -(3/2 + 4/5 )..
(56)x^2+22x+105=0 答案:x1=-7 x2=-15 (57)x^2+19x-20=0 答案:x1=-20 x2=1 (58)x^2-7x+6=0 答案:x1=6 x2=1 (59)x^2+4x-221=0 答案:x1=13 x2=-17 (60)x^2+6x-91=0 答案:x1=-13 x2=7 已知:X平方+X+1=0 则X平方+1/X平方(也就是X平方分之一)等我继续说。
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