Question

ajuda ai galeraaaaaa!

Answer 1

x²-3x-10=0
a=1;b=-3;c=-10
∆=b²-4×a×c
∆=(-3)²-4×1×(-10)
∆=9+40
∆=49

x= -b±√∆ / 2a
x= -(-3)±√49 / 2×1
x= 3±7 / 2
x¹ = 3+8 /2=5
x² = 3-7 /2=-2