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LiRa [457]
3 years ago
12

Solve the equation. identify any extraneous solutions. x=√6x+7

Mathematics
1 answer:
marshall27 [118]3 years ago
3 0
In order to solve the equation we first need to put the condition:
6x+7>=0
x>= -7/6

We square the equation:
x^2=6x+7
x^2-6x-7=0
x^2+x-7x-7=0
x(x+1)-7(x+1)=0
(x-7)(x+1)=0
x1=7
x2=1

Both solutions meet the condition.

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Work:

2x-y=5

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GREYUIT [131]

Answer: 15

Step-by-step explanation:

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Ede4ka [16]
D = sq.root of((x2 - x1)^2 + (y2 - y1)^2)
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3 years ago
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nexus9112 [7]

The formula for the volume of a prism is V=Bh , where B is the base area and h is the height. The base of the prism is a rectangle. The length of the rectangle is 9 cm and the width is 7 cm. The area A of a rectangle with length l and width w is A=lw EXAMPLE

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