Question

1. x? - 8x-20 = 0
II. 3y? - 60y + 297 = 0
quadratic equation​

Answer 1

Answer:

since they are quadratic equations

1. x²-8x-20=0

x²-10x+2x-20=0

x(x-10)+2(x-10)=0

(x-10)(x+2)=0

so, the roots are -2,10

2. 3y²-60y+297=0

y²-20y+99=0

y²-11y-9y+99=0

y(y-11)-9(y-11)=0

(y-9)(y-11)=0

so, the roots are 9,11