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3 years ago

Can someone help me i have no idea how to do this

Mathematics

2 answers:

rewona [7]3 years ago

5 0

Step-by-step explanation:

P=2+7sqrt2+6-2sqrt2+4+5sqrt2=2+6+4+sqrt2(7-2+5)=12+10sqrt2=2(6+5sqrt2)

Ratling [72]3 years ago

3 0

Answer:

Step-by-step explanation:

You have a right triangle,

, so basically, you add all the sides

2+7 $\sqrt{2}$ +6-2 $\sqrt{2}$ +4+5 $\sqrt{2}$ = 12+10 $\sqrt{2}$

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3 years ago

How do I factor x^4-5x^2+6?

Vilka [71]

Answer:

$=(x^2-3)(x^2-2)$

Step-by-step explanation:

So we have the expression:

$x^4-5x^2+6$

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$=u^2-5u+6$

This is a technique called quadratic u-substitution. Now, we can factor in this form.

We can use the numbers -3 and -2. So:

$=u^2-2u-3u+6$

For the first two terms, factor out a u.

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3 years ago