Question

2. solve x2-18x+45=0​

Answer 1

${x}^{2} - 15x - 3x + 45 = 0$

$x(x - 15) - 3(x - 15) = 0$

$(x - 15)(x - 3) = 0 \\ (x - 15 ) = 0 \\ x = 15 \\ (x - 3) = 0 \\ x = 3$

Answer 2

100% CORRECT ANSWER.

BRAINLISST PLS.There is bug in this app which repeats what we have written...100s if times....so i screenshotted actual answer

Here ,

Here , b2-4ac=18^2-4(1)(45) =324-180

=144.........eq1

By quad formula,

x= ( -b +- root b2-4ac)÷2a

=18+ root 144 ÷ 2 (eq1)

=18+12)/2 or 18-12/2

=15 or 6 .

So , its one of both of eithet 15 or 6.