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3 years ago

Use FOIL to derive the identify for (a+b)^2.

Mathematics

1 answer:

Firlakuza [10]3 years ago

3 0

Answer:

a^2+2ab+b^2

Step-by-step explanation:

FOIL method is First variables Outer variables Inner variables Last variables

(a+b)^2 rewritten is (a+b)(a+b)

F - a*a

O - a*b

I - a*b

L - b*b

a*a+a*b+a*b+b*b

simplify

a^2+2ab+b^2

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Step-by-step explanation:

The disc is in circular shape so we will use the formulas for circle in this question.

Given

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Let r be the radius

Then

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putting the values

$75.36 = 2*3.14*r\\75.36 = 6.28r$

Dividing both sides by 6.28

$\frac{6.28r}{6.28} = \frac{75.36}{6.28}\\r = 12\ cm$

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The area of flying disk is 452.16 square centimeters

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Step-by-step explanation:

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3 years ago

Use FOIL to derive the identify for (a+b)^2.​

Use FOIL to derive the identify for (a+b)^2.