Question

if alfa and beta are zeroes of the polynomial 9y square+12y+4. then find the value of alfa square + beta square.

Answer 1

a+b=-12/9 = -4/3,

ab=4/9,

now

(a+b)²=a²+b²+2ab,

(-4/3)²=a²+b²+2×4/9,

16/9 = a²+b²+8/9,

16/9 - 8/9 = a²+b²,

then

a²+b²=8/9

Answer 2

Answer:

8/9

Step-by-step explanation:

Given in attachment