Question

(x-5)(x-3)=-1 me ajudem gente

Answer 1

(x-5)(x-3)=+1
2x-3x×-5x+15=-1
2x-3x×-5x=-1-15
5x×-5x=-1-15
-25x=-16
x=-16/-25
x=400

Answer 2

(x-5)(x-3)=-1

x²-8x+15=-1

x²-8x+15+1=0

x²-8x+16=0

Δ=b²-4ac

Δ=(-8)²-4×1×16

Δ=64-64

Δ=0

x=-b±√Δ

2a

x=8±0

2

x=8

2

x'=4

x"=4