Question

(5+x)²=49 me ajudemmm aaaaaaa​

Answer 1

Explicação passo-a-passo:

(5+x)²=49

5²+2.5.x+x² =49

25+10x+x²=49

x²+10x -24 = 0

Δ=b²-4.a.c

Δ= 100 -4.1.(-24)

Δ=196

x= -b +-√Δ/2.a

x= -10+-14/2

x1= -10+14/2

x1= 4/2

x1=2

x2= -10-14/2

x2= -24/2

x2= -12