Math, asked by lalit47, 1 year ago

5x²+13x+8=0
urgently needed please solve it

Answers

Answered by Light1729
131

5 {x}^{2} + 13x + 8 = 0 \\ 5 {x}^{2} + 5x + 8x + 8 = 0 \\ 5x(x + 1) + 8(x + 1) = 0 \\ (x + 1)(5x + 8) = 0 \\ x =  - 1 \: and \: x =  -  \frac{8}{5}

lalit47: ??
Light1729: use quadratic f
Light1729: formula
lalit47: done
lalit47: not getting
supersonu: Wait lemme solve
lalit47: okay
lalit47: done??
supersonu: Nope
supersonu: Cudn't
Answered by supersonu
83
Hi,

Here's ur answer :-

5x^2+13x+8= 0

=> 5x^2 + 5x + 8x + 8 = 0

=> 5x(x+1) + 8 (x+1) = 0

=>( x+1)(5x+8) = 0

Let x + 1 = 0

=> x = -1

Let 5x+8 = 0

=> 5x = -8

=> x = -8/5

So, x= -1 or -8/5

HOPE IT HELPS (^_^)

PLEASE MARK BRAINLIEST

supersonu: Sorry dear but plz mark Brainliest mine
lalit47: yeah thanks a lot
lalit47: I did that
Light1729: D=b²-4ac=81+4×48=273
lalit47: root3x²-2root2x-2root3=0
supersonu: Ok plz mark Brainliest plzz
supersonu: Now plzz
lalit47: done
supersonu: Kk Thnx
lalit47: your welcome
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