3 years ago

Does anyone know how to foil the answer ?!

Mathematics

1 answer:

Liono4ka [1.6K]3 years ago

7 0

Answer:

(a+b)(c+d)=a c+a d+b c+b d is the formula

Step-by-step explanation:

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3 years ago

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$15x^2+14x-49=0\\\\
Terms:\\
a=15\ \ \ \ b=14\ \ \ \ c=-49\\
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x=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}\\\\
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$Roots:\\\\
x'=\dfrac{-14+56}{30}\\\\
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\boxed{x'=\dfrac{7}{5}}\\\\\\\\
x''=\dfrac{-14-56}{30}\\\\
x''=\dfrac{-70}{30}\\\\
\boxed{x''=\dfrac{-7}{3}}$

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3 years ago

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