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attashe74 [19]
3 years ago
6

Factor 2x4 - 20x2 - 78.

Mathematics
2 answers:
Komok [63]3 years ago
8 0

Answer:

2(x² + 3)(x² - 13)

Step-by-step explanation:

2x⁴ - 20x² - 78

Factor out 2.

2(x⁴ - 10x² - 39)

Find 2 numbers that multiply to get -39 and add to get -10. Those numbers are -13 and 3.

2(x⁴ - 13x² + 3x² - 39)

2(x² + 3)(x² - 13)

Airida [17]3 years ago
7 0

Answer:

2x⁴ - 20x² - 78

To factor the expression look for the LCM of the numbers

LCM of the numbers is 2

Factorize that one out

That's

2( x⁴ - 10x² - 39)

Hope this helps

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Please help i have exam tom. ​
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Answer:

Step-by-step explanation:

this is a simultaneous equation question

f(1)=8  so  a(1) + b = 8

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can you figure this out from here ???

if you can't below is how to solve it

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a + b = 8

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multiply the top equation by 4 and then subtract the bottom one from the top

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now plug 5 into the first equation

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