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KonstantinChe [14]
3 years ago
12

Expand & simplify (x + 10)(x + 9)

Mathematics
1 answer:
BartSMP [9]3 years ago
8 0

Answer:

its

x^{2}  + 19x + 90

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Explanation:

Unclear question. But I inferred this to be clear rendering of your question;

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3 years ago
Write 16/24 in simplest form
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3 years ago
Given f(x) = 4(x - 8), determine the value of f(10).
Ilya [14]

Answer:

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Step-by-step explanation:

f(x) = 4(x - 8)

Let x = 10

f(10) = 4 ( 10-8)

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Solve equation by factoring.
3241004551 [841]

Hi ;-)

x^2+6x-10=30 \ \ /-30\\\\x^2+6x-40=0\\\\a=1, \ b=6, \ c=-40\\\\\Delta=b^2-4ac=6^2-4\cdot1\cdot(-40)=36+160=196\\\\\sqrt{\Delta}=\sqrt{196}=14\\\\x_1=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-6-14}{2}=\boxed{-10}\\\\x_2=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-6+14}{2}=\boxed4

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