Question

Alguien que me ayude porfavor :((​

Answer 1

1.

${x}^{2} - 5 = 220 \\ {x}^{2} = 225 \\ x = 15$

2.

${x}^{2} + x = 306 \\ x = 17$

3.

$x(x + 1) = 552 \\ {x}^{2} + x = 552 \\ x = 23 \\ x + 1 = 24$