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45-(5-2x)^2=4375
-(5-2x)^2=45-4375
-(10-4x)=-4330
-10+4x=-4330
4x=-4330+10
4x=-4320
x=-1080
\(\left(6^{2007}-6^{2006}\right):6^{2006}\)
\(=6^{2007}:6^{2006}-6^{2006}:6^{2006}\)
\(=6^{2007-2006}-1\)
\(=6^1-1\)
\(=6-1\)
\(=5\)
\(\left(7^3+7^5\right).\left(5^4+5^6\right).\left(3^3.3-9^2\right)\)
\(=\left(7^3+7^5\right).\left(5^4+5^6\right).\left(3^{3+1}-9^2\right)\)
\(=\left(7^3+7^5\right).\left(5^4+5^6\right).\left(3^4.9^2\right)\)
\(=\left(7^3+7^5\right).\left(5^4+5^6\right).\left[3^4-\left(3^2\right)^2\right]\)
\(=\left(7^3+7^5\right).\left(5^4+5^6\right).\left(3^4-3^4\right)\)
\(=\left(7^3+7^5\right).\left(5^4+5^6\right).0\)
\(=0\)
\(-3^2+\left\{-54:\left[\left(-2\right)^3+7.|-2|\right]\right\}.\left(-2\right)^2\)'
=\(9+\left\{-54:\left[\left(-8\right)+7.2\right]\right\}.4\)
\(=9+\left\{-54:\left[\left(-8\right)+14\right]\right\}.4\)
\(=9+\left\{-54:6\right\}.4\)
\(=9+\left(-9\right).4\)
\(=9+\left(-36\right)\)
\(=-27\)
chúc bạn học tốt
4.(-2)3 -7.(-4)
= 4.-8 -7 .(-4)
= -32 - -28
= -4
đúng 100% luôn đó
a)\(12:\left\{400:\left[500-\left(125+25×7\right)\right]\right\}\)
\(12:\left\{400:\left[500-300\right]\right\}\)
\(12:2\)
\(6\)
b)\(\left[\left(7-3^3:3^2\right):2^2+99\right]-100\)
\(=\left[4:4+99\right]-100\)
\(=100-100\)
\(=0\)
\(c,3^2×\left[\left(5^2-3\right):11\right]-2^4+2×10^3\)
\(=9×2-16+2×10000\)
\(=18-16+20000\)
\(=20002\)
a) 160 - ( 23 . 52 - 6 . 25 ) = 160-( 8 . 25 - 6 . 25 ) = 160 - ( 25 . ( 8-6)) = 160-(25 . 2) = 160- 50 = 110
b) 4 . 52 - 32 : 24 = 4 . 25 - 4 . 8 : 16 = 4 . ( 25 - 8 : 16 ) = 4 . 24,5 = 98
cơ so giữ nguyên rồi cộng hai lũy thừa lấy 3 + 4 =7
tk cho mk nhé
adrAGU