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Mice21 [21]
3 years ago
8

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

Mathematics
2 answers:
MariettaO [177]3 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]3 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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