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Butoxors [25]
3 years ago
12

The solution to 2x2 – 11 = 87 is .

Mathematics
2 answers:
Klio2033 [76]3 years ago
8 0

Answer:

x = 7, -7

Step-by-step explanation:

2x² - 11 = 87

2x² = 98

x² = 49

x = +/-7

ohaa [14]3 years ago
5 0

Step-by-step explanation:

<u>Step 1:  Subtract 87 from both sides</u>

2x^2 - 11 - 87 = 87 - 87

2x^2 - 11 - 87 = 0

<u>Step 2:  Factor</u>

2x^2 - 11 - 87 = 0

2(x + 7)(x - 7) = 0

x + 7 = 0 and x - 7 = 0

x = -7 and x = 7

Answer:  x = -7, 7

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