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2 years ago

8

Solve x2 + 20x + 100 = 36 for x.

2 answers:

MariettaO [177]2 years ago

7 0

X² + 20x + 100 = 36⇒ x² + 20x + 100 - 36 = 0⇒ x² + 20x + 64 =0

Δ = b²-4ac = 20² -4·1·64 = 400-256 = 144

x₁= (-b+√Δ)/2a = (-20+√144)/2·1 = (-20+12)/2 = -8/2 = -4
x₂= (<span>-b-√Δ)/2a = (-20-√144)/2·1 = (-20-12)/2 = -32/2 = -16

x=-4 or x=-16</span>

Korolek [52]2 years ago

4 0

Answer:

x=-4 or x=-16

Step-by-step explanation:

The other person was correct i got 100 on my test

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Step-by-step explanation:

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2 years ago

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2 years ago

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lilavasa [31]

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Step-by-step explanation:

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3 years ago

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<u>Step-by-step explanation</u>:

Given,

The lines PQ and RS are parallel to each other.
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The slopes of parallel lines are equal.

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Answer:

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Step-by-step explanation:

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