What is the value of 4x^2+5x when x=1

So the answer to this equation is 9

to find the answer we first need to substitute the x for 1

so the equation would be 4*1^2+5*1

so now we simplify the equation so it would be 4+5*1

and 4+5*1 simplified is 4+5

and 4+5=9

You would do 4^2=16+5=The answer is 21.