Answer:
Its a i just took the test
Step-by-step explanation:
x =
Let the number be x
x + 2x² = 10
Factorize x + 2x²
x(1 + 2x) = 10
Divide both sides by (1 + 2x)
-20 is -10 × 2
-1 is -0.5 + -0.5
5/8 =)