Question

1) Determine o valor de x para que o volume do paralelepípedo seja igual
a 20m3
x + 3
2
х

Answer 1

2.x.(x+3) = 20. ==> :(2)

x.(x+3) = 10

x²+3x-10 = 0 => b/c = 3/-10 = 5-2/5×-2

(x+5). (x-2) = 0

x'=-5. (x"=2) <===©