3 years ago

What is the solution to this equation?

Mathematics

1 answer:

Agata [3.3K]3 years ago

3 0

The answer would be x = 7

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Solve by completing the square<br><br>x squared +14x - 51=0

Nesterboy [21]

$x^2 +14x - 51=0\\ \\\Delta = b^{2}-4ac =14^{2}-4*1*(-51)=196+204=400 \\ \\x_{1}=\frac{-b-\sqrt{\Delta }}{2a} =\frac{-14- \sqrt{400}}{2}=\frac{-14-20}{2}= \frac{-34}{2}=-17\\ \\x_{2}=\frac{-b+\sqrt{\Delta }}{2a} =\frac{-14+ \sqrt{400}}{2}=\frac{-14+20}{2}= \frac{6}{2}=3$

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Paraphin [41]

Answer:16

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For 36 players 12 pizzas are needed

For 1 player 12/36 pizzas are needed

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Original price: $38; Markup: 10% what is the price now

Solnce55 [7]

Markup: 11.11%

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