Hey number 8. Be super careful, less than always look at that it should be 5n-3
Answer:
279638.5416666667
Step-by-step explanation:
The last option :) Ask if explanation needed
given:
x² + 12x = 11
perfect square:
a² + 2ab + b²
a² = x² ⇒ x * x
2ab = 12x ⇒ 2(6)x
b² = 6² ⇒ 36
x² + 12x + 36 = 11 + 36
(x+6)(x+6) = 47
Both sides must be added with 36.
