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3 years ago

(x+5) (×+5)=49. I need to know what x is, how do I solve this?

Mathematics

1 answer:

Archy [21]3 years ago

4 0

$(x+5)^2=49$
squaer root both sides
x+5=+/-7
minus 5 both sides
x=-5+/-7
x=-5+7=2
x=-5-7=-12

x=2 or -12

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Answer:

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Step-by-step explanation:

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3 years ago

A student says that if 5x2 = 20, then x must be

lutik1710 [3]

Answer:

I agree with the student's answer. "x" cannot be -2 because then it would make -20 which is not equal to 20:

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Step-by-step explanation:

Justificaiton:

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x = 2

Second Justification:

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