Question

The roots of the quadratic equation
x² – 9x + 20= 0​

Answer 1

Answer:

heya mate ☺

$x ^{2} - 9x + 20 = 0 \\ = > x ^{2} - (5 + 4) x + 20 = 0 \\ = > x ^{2} - 5x - 4x + 20 = 0 \\ = > x(x - 5)- 4(x - 5) = 0 \\ = > (x - 4)(x - 5) = 0 \\ either \: (x - 4) = 0 \\ = > x = 4 \\ or \: (x - 5) = 0 \\ = > x = 5$

hope it helps u ✌

hAaPy fRiEnDsHiP dAy mAtE ♡

Answer 2

Answer:

x2 - 5x -4x +20 = 0

x(x -5) -4(x - 5)

( x-4) (x-5) =0

x - 4 = 0 and x - 5 = 0

x = 4 and x = 5 is the root of quadratic equation .

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HOPE U UNDERSTAND.....