Question

(x-1).(x+5)=7 me ajudemmm​

Answer 1

hey!!

(x-1).(x+5)=7 me ajudemmm

Answer:-

(x-1)(x+5)=7

=>x²-5-x+5x=7

=>x²+4x-12=0

=>x²+6x-2x-12=0

=>x(x+6)-2(x+6)=0

=>(x-2)(x+6)=0

so,

x-2=0

x=2

or

x+6=0

x= -6

I hopes its help's u

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@Abhi❤❤

Answer 2

(x - 1)(x + 5) = 7

x² + 5x - x - 5 = 7

x² + 4x - 5 - 7 = 0

x² + 4x - 12 = 0

A= 1

B= 4

C= - 12

∆= b² - 4ac

∆= 4² - 4 • 1 • ( - 12)

∆= 16 + 48

∆= 64

x= - b ± √∆ /2a

x= - 4 ± √64 / 2 • 1

x'= - 4 + 8/2 = 4/2 = 2

x''= - 4 - 8/2 = - 12/2 = - 6

S= ( 2 , - 6)