FACTORISE The Qudratic
Equation. y2-6y-7=0​

Factor y2−6y−7 using the AC method.

(y−7)(y+1)=0

If any individual factor on the left side of the equation is equal to 0, the entire expression will be equal to 0.

y−7=0

y+1 =0

Set y−7 equal to 0 and solve for y.

y=7

Set y+1 equal to 0 and solve for y.

y= −1

The final solution is all the values that make

(y−7)(y+1)=0 true.

y=7,−1

Step-by-step explanation:

Hope it is helpful

256π units²   (answer b)

step-by-step explanation:

the formula for the surface area of a sphere of radius r

is             a = 4πr²

and so, if r = 8 units, then the surface area is:

a = 4π(8 units)² = 256π units²   (answer b)

answer: i believe it’s 245.04

step-by-step explanation: