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3 years ago

Solve Using Square Roots x^2-81=0 4x-25=0 x^2-18=0 3x^2-8=25 x^2+72=0

1 answer:

4 0

X=9
x=6.25
x=4.24
x=3.32
x= can't take the square root of a negative number

*also remember that when you take the square root it is the + and - sign for the answer

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gizmo_the_mogwai [7]

Answer:

Step-by-step explanation:

-3(1+p)=8p-36

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Step-by-step explanation:

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3 years ago

Read 2 more answers

Sin α = 21/29, α lies in quadrant II, and cos β = 15/17, β lies in quadrant I Find sin (α - β).

Sever21 [200]

$\sin(\alpha-\beta)=\sin\alpha\cos\beta-\cos\alpha\sin\beta$

$\sin\alpha=\dfrac{21}{29}\implies \cos^2\alpha=1-\sin^2\alpha=\dfrac{400}{841}$

Since $\alpha$ lies in quadrant II, we have $\cos\alpha$ , so

$\cos\alpha=-\sqrt{\dfrac{400}{841}}=-\dfrac{20}{29}$

$\cos\beta=\dfrac{15}{17}\implies\sin^2\beta=1-\cos^2\beta=\dfrac{64}{289}$

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