Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
B=\(3^{24}-\left(27^4+1\right)\left(9^6+1\right)=-1062883\)A=123(123+154)+772=123.277+772=34843
C=\(85^2+75^2+65^2+55^2-45^2-35^2-25^2-15^2=16000\)
(1/2+2/5+7/3+5/9+123/159).((252-2.25.15+152)-100)
=(1/2+2/5+7/3+5/9+123/159).((25-15)2-100)
=(1/2+2/5+7/3+5/9+123/159).(102-100)
=(1/2+2/5+7/3+5/9+123/159).(100-100)
=(1/2+2/5+7/3+5/9+123/159).0=0
Mk mak lm mấy cái con toán này
Thì mk sáng mai cx ko lm xng đôu
Bấm mẹ máy tính cho nó nhanh
K mk
\(a)\)\(\frac{10^{12}+5^{11}.2^9-5^{13}.2^8}{4.5^5.10^6}\)
\(=\)\(\frac{2^{12}.5^{12}+2^9.5^{11}-2^8.5^{13}}{2^8.5^{11}}\)
\(=\)\(\frac{2^8.5^{11}\left(2^4.5+2-5^2\right)}{2^8.5^{11}}\)
\(=\)\(2^4.5+2-5^2\)
\(=\)\(80+2-25\)
\(=\)\(57\)
Chúc bạn học tốt ~
a/ \(5^4.3^4-\left(15^2-1\right)\left(15^2+1\right)\)
\(=15^4-\left(15^4-1^2\right)\)
\(=1\)
\(\left(18^4+1\right)\left(18-1\right)-9^8.2^8\) câu này bn xem lại đề đi nha, chắc bn chép sai đề rồi
b/ \(\frac{77^2+17^2-34.77}{77^2-17^2}\) \(=\frac{77^2-2.17.77+17^2}{\left(77-17\right)\left(77+17\right)}\)
= \(\frac{\left(77-17\right)^2}{\left(77-17\right)\left(77+17\right)}\)
= \(\frac{77-17}{77+17}\)
\(=\frac{60}{94}=\frac{30}{47}\)
\(\frac{135^2+130.135+65^2}{135^2-65^2}=\frac{135^2+2.65.135+65^2}{\left(135-65\right)\left(135+65\right)}\)
\(=\frac{\left(135+65\right)^2}{\left(135-65\right)\left(135+65\right)}\)
\(=\frac{135+65}{135-65}=\frac{200}{70}=\frac{20}{7}\)
chúc bn học tốt
Mk xin lỗi nha, câu c sai đề
c) (x+6)4 + (x+8)4 = 272
21) 125x3 -1
=125x3-13
=(5x-1)(25x2+5x+1)
22) 4x4 - 9x2
=x2(4x2-9)
=x2(4x2-32)
=x2(2x-3)(2x+3)
23) 64x2 - 25y4
=(8x)2-(5y2)2
=(8x-5y2)(8x+5y2)
24) 4( a + b )2 - 9( a - b )2
=22(a+b)2-32(a-b)2
=[2(a+b)]2-[3(a-b)]2
=[2(a+b)-3(a-b)][2(a+b)+3(a-b)]
=(2a+2b-3a+3b)(2a+2b+3a-3b)
=(5a-b)(5b-a)
25) 8( x + 1 )3 - 27( x - 1 )3
=23(x+1)3-33(x-1)3
=[2(x+1)]3-[3(x-1)]3
={[2(x+1)]-[3(x-1)}{[2(x+1)]2+[2(x+1)]*[3(x-1)]+[3(x-1)]2}
={2x+2-3x+3}{4x2+8x+4+6x2-6+9x2-18x+9}
=(5-x)(19x2-10x+7)
a) \(A=123\left(123+154\right)+77^2\)
\(A=123^2+\left(123.154\right)+77^2=\left(123+77\right)^2=200^2=400\)
b) \(B=3^{24}-\left(2^{47}+1\right)\left(9^6-1\right)\)
\(B=3^{24}-\left(3^{12}-1\right)\left(3^{12}+1\right)\)
\(B=3^{24}-3^{24}+1=1\)
c) \(C=85^2+75^2+65^2+55^2-45^2-35^2-25^2-15^2\)
\(C=\left(85^2-15^2\right)+\left(75^2-25^2\right)+\left(65^2-35^2\right)+\left(55^2-45^2\right)\)
\(C=\left(85+15\right)\left(85-15\right)+\left(75+25\right)\left(75-25\right)+\left(65+35\right)\left(65-35\right)\left(55+45\right)\left(55-45\right)\)
\(C=100\left(60+50+40+30+20+10\right)\)
\(C=100.210=21000\)
A=40000
B=1
C=16000