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Anna71 [15]
3 years ago
7

Part 9: I need help. please help me​

Mathematics
1 answer:
Trava [24]3 years ago
3 0

Answer:   A) a² = b² - w² + 2wx

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

b² - (w - x)² = a² - x²

b² - (w² - 2wx + x²) = a² - x²

b² - w² + 2wx - x² = a² - x²

b² - w² + 2wx       = a²

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Solve x2 − 10x = −13.
aev [14]

Answer:

B

Step-by-step explanation:

First, let's rearrange the given equation into something more recognizable. If we add 13 to both sides, we now have the polynomial x^{2}-10x+13. We can now use the quadratic formula to solve.

Remember that the quadratic formula is

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

Substitute the numbers from the equation into the formula.

\frac{-(-10)+/-\sqrt{(-10)^{2}-4(1)(13) } }{2(1)}

Simplify:

\frac{10+/-\sqrt{100-52} }{2}

\frac{10+/-\sqrt{48} }{2}

Here, I'm going to assume that there was a mistype in option B because if we divide out the 2 we end up with 5+/-\sqrt{48}.

Hope this helps!

6 0
2 years ago
Complete the square for 5x^2+10x-16.
Lelechka [254]
Answer = 5(x+1)^2 -21

5 {x^2 + 2x } - 16

5 {(x+1)^2 -1 } - 16
5(x+1)^2 -5 - 16

5(x+1)^2 -21
7 0
3 years ago
LOTS OF POINTS Please help
Komok [63]

Answer:

1. 5b^2-b-2 (so option 3)

2. 4x-1 (so option 2)

Step-by-step explanation:

For the first one you need to just simplify the expression

For the second one you need to combine like terms

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Answer:

i believe the answer that you picked is right ....i think ^^

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