Question

(x+5 ) (x+2) - 3 (4x-3) = (x-5)²

Answer 1

(x+5 ) (x+2) - 3 (4x-3) = (x-5)²
x²+2x+5x+10 - 12x+9=x²-10x+25 -> tutaj x² się skróci
2x+5x-12x+10x=25-10-9
5x=6 / 5
x= 6/5
x = 1 1/5 (jedna cała i jedna piąta)

Answer 2

(x+5 ) (x+2) - 3 (4x-3) = (x-5)²
x²+2x+5x+10 - 12x+9=x²-10x+25
2x+5x-12x+10x=25-10-9
5x=6 / 5
x= 1 1/5