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Lerok [7]
3 years ago
8

Solve the quadratic equation by completing the square.

Mathematics
1 answer:
kicyunya [14]3 years ago
7 0
X2 = 5.59 or x1 = 8.41 also for the top it’s the second one (x - 7)^2 = 2
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Simplify the expression.<br> PLEASE HELP ME
Hatshy [7]

Answer:

Step-by-step explanation:

\sqrt[3]{27x^{3}y^{6} z^{9} }\\=3^{3 *\frac{1}{3}} * x^{3*\frac{1}{3} }*y^{6*\frac{1}{3} }*z^{9*\frac{1}{3} }\\= 3xy^{2}z^{3}

hope it will help :)

8 0
3 years ago
Read 2 more answers
I need help with this its still confusing
Leviafan [203]

Answer:

64 and 13 I hope this helps

Step-by-step explanation:

8 0
2 years ago
Someone help me answer this one
Verdich [7]
Hey again...
So the first angle is angle C.
The first side is FC
and the second side is CG.
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6 0
4 years ago
Show that cos(3theta) = 4cos3(theta) − 3cos (theta).
Delvig [45]

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

To prove:

\cos 3\theta=3\cos^3 \theta-3\sin^2 \theta\cos \theta

Identities used:

\cos(A+B)=\cos A\cos B+\sin A\sin B      ......(1)

\sin 2A=2\sin A\cos A        ........(2)

\cos 2A=\cos^2A-\sin^2 A    .......(3)

\sin^2A+\cos^2A=1       .......(4)

Taking the LHS:

\Rightarrow \cos 3\theta=\cos (\theta +2\theta )

Using identity 1:

\Rightarrow \cos (\theta +2\theta )=\cos \theta \cos 2\theta-\sin \theta \sin 2\theta

Using identities 2 and 3:

\Rightarrow \cos \theta (\cos ^2\theta-\sin^2 \theta )-\sin \theta (2\sin \theta \cos \theta )\\\\\Rightarrow \cos^3\theta -\sin^2\theta \cos \theta -2\sin^2 \theta \cos \theta \\\\\Rightarrow \cos^3\theta -3\sin^2\theta \cos \theta

Using identity 4:

\Rightarrow \cos^3\theta -3(1-\cos^2\theta) \cos \theta\\\\\Rightarrow \cos^3\theta-3\cos \theta+3\cos^3\theta\\\\\Rightarrow 4\cos^3\theta -3\cos \theta

As, LHS = RHS

Hence proved

5 0
3 years ago
How can I find the area of this irregular shape?
Daniel [21]

Answer:

the idea is to devide the shape into 3 smaller parts.

Step-by-step explanation:

devide it to three areas :

> semi-circle (0.5 * pi * R), R=5

>Square (10 * 10)

> triangle (0.5 * base * height),

bsse =10, height =7

Add them together.

6 0
4 years ago
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