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50 POINTS. WILL MARK BRAINLIEST IF YOU SHOW WORK. NEED HELP ASAP
3. Write the equation, in standard form, of the parabola containing the following points:
(0, 1), (1,5), (2,3)

4. Solve the following quadratic equation equation by factoring x^2 - 5x = 14

5. Solve the following quadratic equation by using the quadratic formula
-2x^2 - 3x + 4 = 0

Respuesta :

Lotusrobe

Answer:

For question 4

x²- 5x=14

x²- 5x -14 = 0

1 multiply by -14 is -14

Find L.C.M that when we multiply we get last number that is -14 and when we add or subtract we get the middle number. And that is (-7,2)

Put it into where the -5x is given us

x²- 7x+2x-14=0

You then factorise given us

(x²-7x)(+2x-14)=0

x(x-7)+2(x-7)

(x+2)(x-7)=0

x+2=0

x=-2

(x-7)=0

x=7

therefore, x=-2 or 7

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