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PlzWegnerkolmp2741o helpme plzzzzzzzzzz

PlzWegnerkolmp2741o helpme plzzzzzzzzzz-example-1
User Sagive
by
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2 Answers

0 votes

Answer:

C)

Explanation:

-2+sqrt(7) ≈ 0.649

-2-sqrt(7) ≈ -4.646

each are x-intercepts

PlzWegnerkolmp2741o helpme plzzzzzzzzzz-example-1
User Jcg
by
8.4k points
7 votes

Answer:

y = -2 +sqrt(7)

y = -2 - sqrt(7)

Explanation:

y^2 +4y +4 = 7

Factor, recognizing that this is the sum of squares

a^2 +2ab+b^2 = (a+b)^2

(y+2) ^2 = 7

Take the square root of each side

sqrt((y+2) ^2) =± sqrt(7)

y+2 = ± sqrt(7)

Subtract 2 from each side

y+2-2 = -2 ± sqrt(7)

y = -2 ± sqrt(7)

User Sariii
by
7.5k points

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