Question

Please help asap!!!!!! (picture)

Answer 1

Answer:
`6-√(21) , 6+√(21)`

Explanation:

For
`x^(2) =-12x+15`, so
`x^(2) +12x-15=0` We apply the quadratic equation formula:
`(-b+-\sqrt{b^(2)-4*a*c })/2*a`, where
`a=1, b=12 y c=-15`. so;

`(12+-\sqrt{12^(2) -4*1*(-15)} )/(2*1) = (12+-√(144-60))/2 = (12+-√(84))/2`, but
`√(84) = 2√(21)` We have that:

`Solution : (6-√(21) , 6+√(21) )`