Question

5k² +20=100 respostaaa

Answer 1

5k² + 20 = 100
5k² = 100 - 20
5k² = 80
k² = 80/5
k² = 16
k = +/- √16
k = +/- 4

Answer 2

5k² +20=100
5k²=80
5k= raiz de 80
k=8,9/5
k=1,78