SMOKIN THIS ZAZA IT GO STRAIGHT TO THE MATHA​

The vertex of this parabola is at (-2,-3). when the x-value is -1, the y-value is -5. what is the coefficient of the squared expression in the parabola's equation?

Write 5(6x+4)-2(5x-2) in the form a(bx+c) where a,b and c integers and a> 1

Prove that 16^4-2^13-4^5 is divisible by 11.