rainbowsverymacho7 rainbowsverymacho7
  • 25-05-2019
  • Mathematics
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Factorise this equation

Factorise this equation class=

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gabby5792
gabby5792 gabby5792
  • 25-05-2019

[tex]x^{2}  - 2x +35[/tex]

To factor we must first find factors of 35

The only factors of 35 are : 5 & 7

-2x is what 5 and 7 make

but only if 7 is negative and 5 is positive

so our final factors are

(x - 7) (x  + 5)

______________________________________________

[tex]2x^{2} +7x +6[/tex]

For the second equation, were going to multiple the coefficient of [tex]x^{2}[/tex] ( which is 2 ) by 6

We get 12

What factors of 12 add up to 7?

3 and 4

So our final factors are

(2x+3)(x+2)

Answer Link

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