Mathematics
22.09.2020 20:44
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Can anyone tell me how to do this? (steps) and can you answer these two questions

Can anyone tell me how to do this? (steps) and can you answer these two questions for me plz
need by tomorrow
Can anyone tell me how to do this? (steps) and can you answer these two questions for me plz
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missheyward30
missheyward30
4,9(25 marks)
Ax²+bx+c=0

The formula to solve for x is:

x= \frac{-b(+/-) \sqrt{ b^{2}-4ac }  }{2a}

So for 3x²+13x+10=0, plug in the data

x=-13±√13²-4(3)(10) / 2(3)
x=-13±√169-120 / 6
x=-13±√49 /6
x=-13±7 / 6

x=-13+7/6
x=-6/6
x=-1

x=-13-7/ 6
x=-20/6 or 3.3repeating

3x²+14x+15=0
x=-14±√14²-4(3)(15) / 2(3)
x=-14±√196-180 /6
x=-14±√16 / 6

x=-14+4/6
x=-10/6 or 1.6repeating

x=-14-4/6
x=-18/6
x=-3
silvernekoo
silvernekoo
4,7(57 marks)

answer:

d

step-by-step explanation:

the x- intercept is where the graph crosses the x- axis.

the graph crosses the x- axis at x = - 1, thus

x- intercept = (- 1, 0 )

the y- intercept is where the graph crosses the y- axis.

the graph crosses the y- axis at y = - 3, thus

y- intercept = (0, - 3 )

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