Câu hỏi của Lê Thái Dương

Question

Tìm x100 : [2 . (x + 5) - 12] = -5𝑥−(28−𝑥)=−56−73+10556 - 6(x - 2)^3 = 4402^x + 2^x+3 = 72

Nguyễn Hoàng Minh · Accepted Answer

$a,\Rightarrow2\left(x+5\right)-12=-20\
\Rightarrow2\left(x+5\right)=-8\
\Rightarrow x+5=-4\Rightarrow x=-9\
b,\Rightarrow x-28+x=-24\
\Rightarrow2x=4\Rightarrow x=2\
c,\Rightarrow6\left(x-2\right)^3=-384\
\Rightarrow\left(x-2\right)^3=-64=\left(-4\right)^3\
\Rightarrow x-2=-4\Rightarrow x=-2\
d,\Rightarrow2^x\left(1+2^3\right)=72\
\Rightarrow2^x\cdot9=72\
\Rightarrow2^x=8=2^3\Rightarrow x=3$Câu trả lời: $a,\Rightarrow2\left(x+5\right)-12=-20\
\Rightarrow2\left(x+5\right)=-8\
\Rightarrow x+5=-4\Rightarrow x=-9\
b,\Rightarrow x-28+x=-24\
\Rightarrow2x=4\Rightarrow x=2\
c,\Rightarrow6\left(x-2\right)^3=-384\
\Rightarrow\left(x-2\right)^3=-64=\left(-4\right)^3\
\Rightarrow x-2=-4\Rightarrow x=-2\
d,\Rightarrow2^x\left(1+2^3\right)=72\
\Rightarrow2^x\cdot9=72\
\Rightarrow2^x=8=2^3\Rightarrow x=3$

duong thu · Answer

a,⇒2(x+5)−12=−20⇒2(x+5)=−8⇒x+5=−4⇒x=−9b,⇒x−28+x=−24⇒2x=4⇒x=2c,⇒6(x−2)3=−384⇒(x−2)3=−64=(−4)3⇒x−2=−4⇒x=−2d,⇒2x(1+23)=72⇒2x⋅9=72⇒2x=8=23⇒x=3a,⇒2(x+5)−12=−20⇒2(x+5)=−8⇒x+5=−4⇒x=−9b,⇒x−28+x=−24⇒2x=4⇒x=2c,⇒6(x−2)3=−384⇒(x−2)3=−64=(−4)3⇒x−2=−4⇒x=−2d,⇒2x(1+23)=72⇒2x⋅9=72⇒2x=8=23⇒x=3Câu trả lời: a,⇒2(x+5)−12=−20⇒2(x+5)=−8⇒x+5=−4⇒x=−9b,⇒x−28+x=−24⇒2x=4⇒x=2c,⇒6(x−2)3=−384⇒(x−2)3=−64=(−4)3⇒x−2=−4⇒x=−2d,⇒2x(1+23)=72⇒2x⋅9=72⇒2x=8=23⇒x=3a,⇒2(x+5)−12=−20⇒2(x+5)=−8⇒x+5=−4⇒x=−9b,⇒x−28+x=−24⇒2x=4⇒x=2c,⇒6(x−2)3=−384⇒(x−2)3=−64=(−4)3⇒x−2=−4⇒x=−2d,⇒2x(1+23)=72⇒2x⋅9=72⇒2x=8=23⇒x=3

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