Question

Guys, guys help me out please

Answer 1

5 times 5 is 10 minus x (just one varible means 1x) so 10x minus 1x equals 9x plus 9 so it would be written 9x plus 9

Answer 2

5x^2-x+9=?

Fill in the variable which is given (x=3)

5(3)^2-3+9=51