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RoseWind [281]
3 years ago
13

Solve using the quadratic formula

Mathematics
1 answer:
myrzilka [38]3 years ago
8 0

Answer:

w = 3\sqrt{2}  or w = -3\sqrt{2}

Step-by-step explanation:

5w^2 - 90 = 0

5w^2 + 0w - 90 = 0

aw^2 + bw + c = 0 ----> a = 5, b = 0, c = -90

w = \frac{-b +- \sqrt{b^{2} - 4ac} }{2a}

w = \frac{-0 +- \sqrt{0^{2} - 4(5)(-90)} }{2(5)}

w = \frac{-0 +- \sqrt{0 + 1800}} {10}

w = \frac{0 +- \sqrt{1800}}{10}

w = \frac{0 + \sqrt{1800} }{10}   or  w = \frac{0 - \sqrt{1800}}{10}

w = \frac{30\sqrt{2} }{10}  or  w = \frac{-30\sqrt{2}} {10}

w = 3\sqrt{2} or  w = - 3\sqrt{2}

Hope this helps!

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I recommend drawing it out to see what's going on. See the drawing below.

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Greeley [361]

Answer:

Options (3), (4) and (5)

Step-by-step explanation:

1). a² - 9a + 7ab + 63b

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Step-by-step explanation:

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