Question

Quadratic and Cubic Polynomial Equations
Q1) Solve these quadratic polynomial and find its zeroes:
1,2x2 + 8x – 5 = 0
2,5x2 + 24x – 5 = 0
3,x2 - 8x + 15 = 0
4,6x2 + 12x – 210 = 0
5,x2 - 27x – 21 = 0
Q2) Solve these cubic polynomial and find its zeroes:
1,2x3 + 3x2 – 11x – 6 = 0
2,x3 − 6x2 + 11x – 6 = 0
3,x3 – 2x2 – x + 2 = 0
4,x3 – 23x2 + 142x – 120 = 0
5,x3 + 3x2 + x + 3 = 0
6,3x3 – 3x2 – 90x = 0

Answer 1

Answer:

1.) main 3.) answer in the attachment photo.

2.) main 2.) answer in the attachment photo.

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Answer 2

$\huge\fcolorbox{black}{magenta}{ ★Aηѕωєя᭄✍︎}$

1.3The given equation is x²−8x+15=0

x²−8x+15=0

x²−5x−3x+15=0

x(x−5)−3(x−5)=0

(x−3)(x−5)=0

x=3,5

2.1 in the ATTACHMENTS