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Mariulka [41]
3 years ago
8

Can someone help me plz

Mathematics
1 answer:
umka2103 [35]3 years ago
4 0

Step-by-step explanation:

Equation: 4(3+x)=36

First step:

(4*3)+(4*x)=36

Second step:

12+4x=36

Third step:

4x=36-12\\4x=24

Fourth step:

x=\frac{24}{4}\\ x=6

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Answer:

x = 1,  x = 2,  x = 3

Step-by-step explanation:

Hello, please consider the following.

(x^2-4x)^2+7x^2-28x+12=0 \\\\(x(x-4))^2+7x(x-4)+12=0\\\\\text{Let's note }X = x(x-4)\text{ the equation becomes}\\\\X^2+7X+12=0\\\\\text{The sum of the zeroes is -7=-3+(-4) and the product is 12=(-4)*(-3).}\\\\\text{Wo we can factorise.}\\\\X^2+7X+12=X^2+4X+3X+12=X(X+4)+3(X+4)=(X+4)(X+3)=0\\\\X=-4 \ \ or \ \ X=-3

So we need to solve:

x(x-4)=-4 \ \ or \ \ x(x-4)=-3\\\\ x^2-4x-4=(x-2)^2=0 \ \ or \ \ x^2-4x+3=(x-1)(x-3)=0

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