X^(2)+x-20 splitting the middle term

1 answer:

5 0

Are you trying to factorise this?

Here is a way you may not have been taught....
(x + a)(x + b) = x^2 + (a + b)x + ab

So you need to find two factors of -20 that add up to +1
-4 x 5 = -20 and -4 + 5 = 1. Perfect

x^2 + x - 20 = (x - 4)(x + 5)

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LekaFEV [45]

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3 years ago

He football team has 30 more members than the basketball teams. If each group had 10 more members, the ratio of their membership

aivan3 [116]

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Each group has 10 more members added: x + 10 and y + 10. We can write x + 10 as 30 + y + 10 or 40 + y.

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7 0

4 years ago

0,0a_2×1÷4=12÷10a_52÷10

kozerog [31]

Answer:

19/4

Step-by-step explanation:

0.5=12/10a-5.2

1/2=6/5a-26/5

5=12a-52

-12a=-57

8 0

3 years ago

Solve for w -2/5+1/2w= -6/7

I am Lyosha [343]

-2/5 +1/2w = -6/7
move the -2/5 over by addition

1/2w = -16/35
w = -32/35

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3 years ago

Can I simplify this down anymore? a (a+b) (a-b) / a^2 + 2ab + 2b^2

Andrew [12]

I don't believe you can. It would end up being 1/2 for all the terms so just leaving it as a fraction would be neater.

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4 years ago