Hi. I need help with these
See image for question
Answer no 8 ,9 and 10

Step-by-step explanation:

8.

Given

The sum of the roots is α + β = -q/p, the product of then roots αβ = r/p

9.

Given function

The minimum point is reached at vertex

The vertex is:

The corresponding y-coordinate is:

So the point is:

10.

Given function

The maximum is reached at vertex

The vertex is:

The corresponding y-coordinate is:

So the maximum point is:

its 4 because 2 times 2 is 4, if you double the number two you get four

step-by-step explanation:

given perimeter: 28cm

length: 9cm

atp,

2(l+w)=p of the reactangle

2(9+x)=28

18+2x=28

2x=28-18

x=10/2

x=5

therefore width is 5 cm