3 years ago

√7-x+5=x help please

1 answer:

3 0

X-5= $\sqrt{7-x}$

Squaring and subtracting 7-x, we get:

$x^2-9x+18=0$

Factoring, we have:

(x-6)(x-3)=0
So x can be 6 or 3.

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3 years ago

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2 years ago

Help pls!! .........................................................................

ser-zykov [4K]

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a)8

b)13

Step-by-step explanation:

a) ar = c

a^2+b^2=c^2

4^2+7^2=c^2

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c = $\sqrt{65}$ ~8

b) sa= c

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49+121 = c2

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I hope im right!!

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