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3 years ago

Using FOIL method. Multiply the terms. (X^2 -7)(x^2 -4)

Mathematics

1 answer:

murzikaleks [220]3 years ago

4 0

Answer:

x^4-11x^2+28

Step-by-step explanation:

Set it up

x^2(x^2-4) -7(x^2-4)

2. Multiply

x^4-4x^2-7x^2+28

3. Simplify

x^4-11x^2+28

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Valentin [98]

Answer:

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Step-by-step explanation:

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2 years ago

Please help!! MathsWatch, Surd Expressions, Clip 207c

dexar [7]

Answer:

$A=(72+36\sqrt{3})\ mm^2$

Step-by-step explanation:

see the attached figure with letters to better understand the problem

Let

a ----> the height of rectangle in mm

b ---> the base of rectangle in mm

step 1

Find the base of rectangle

$b=AB+BC+CD+DE$ ----> by segment addition postulate

substitute

$b=3+3+3+3=12\ mm$

step 2

Find the height of rectangle

$a=FB+CG+GH$ ---> by segment addition postulate

substitute the given values

$a=3+CG+3\\a=6+CG$

Find the length sides CG

Applying the Pythagorean Theorem

$BG^2=BC^2+CG^2$

substitute the given values

$6^2=3^2+CG^2$

$CG^2=6^2-3^2$

$CG=\sqrt{27}\ mm$

simplify

$CG=3\sqrt{3}\ mm$

therefore

$a=(6+3\sqrt{3})\ mm$

step 3

Find the area of rectangle

$A=ab$

we have

$a=(6+3\sqrt{3})\ mm$

$b=12\ mm$

substitute

$A=(6+3\sqrt{3})(12)=(72+36\sqrt{3})\ mm^2$

8 0

3 years ago

12 tickets sold for every 4 tickets not sold if 704 were not sold how many tickets were sold

horsena [70]

there would be 14 tickets

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3 years ago

Hi im lazy so can someone help me with this<br> how many factors does 2000 have thx

viva [34]

Answer:

Step-by-step explanation:

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3 years ago

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the ratio to boys to girls in sixth grade is 5:3 if their are 400 sixth graders how many boys are their

ohaa [14]

Answer:

250 boys

Step-by-step explanation:

sum the parts of the ratio, 5 + 3 = 8 parts

Divide the total by 8 to find the value of 1 part of the ratio

400 ÷ 8 = 50 , then

number of boys = 5 × 50 = 250

7 0

2 years ago

Read 2 more answers