Question

simplyfy ( a² + a+1 ) + 5 and find its value for a = 1 a = ​

Answer 1

Step-by-step explanation:

$a = 1 \: \\ so \: ( 1 {}^{2} + 1 + 1) + 5 \\ = (1 + 1 + 1)5 \\ = (3) \times 5 \\ = 15$