3 years ago

Find the values of a and b such that x^2+2x-7=(x+a)^2+b

Mathematics

1 answer:

nevsk [136]3 years ago

4 0

Answer:

a = 1, b = -8

Step-by-step explanation:

you need complete the square to get a and b:

x^2+2x(+1)-7(-1)

by adding and subtracting 1 you aren’t changing the equation because 1-1=0

then u could simplify the equation to

(x+1)^2 - 8 to get a=1 and b=-8

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or
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Irina18 [472]

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Answer:

Step-by-step explanation:

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3 years ago

the captain of a boat knows that the lighthouse on the coast is 200 feet tall. he measures the angle of elevation to the top of

krek1111 [17]

Answer:

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Step-by-step explanation:

Refer the figure given.

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3 years ago

Factor by grouping.......

Gekata [30.6K]

Answer:

A. (7n-1) (8n-1)

Step-by-step explanation:

56n^2 -8n-7n+1

56n^2 -8n -7n+1

Factor out 8n from the first group and -1 from the second group

8n (7n-1) -1(7n-1)

Factor out the (7n-1)

(7n-1) (8n-1)

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