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Romashka [77]
2 years ago
15

Write the quadratic equation in standard form -8x+3x^2=-18

Mathematics
1 answer:
stepladder [879]2 years ago
6 0
X = ± √<span>6 </span><span>= ± 2.4495 because i know it</span>
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Answer:

9\, w^{2} - 100 = (3\, w - 10) \, (3\, w + 10).

Step-by-step explanation:

Fact:

\begin{aligned} & (a - b)\, (a + b)\\ =\; & a^{2} + a\, b - a\, b - b^{2} \\ =\; & a^{2} - b^{2} \end{aligned}.

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In this question, the expression (9\, w^{2} - 100) is the difference between two terms: 9\, w^{2} and 100.

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9\, w^{2} - 100 = (3\, w)^{2} - (10)^{2}.

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\begin{aligned}& 9\, w^{2} - 100 \\ =\; & (3\, w)^{2} - (10)^{2} \\ = \; & (3\, w - 10)\, (3\, w + 10)\end{aligned}.

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