Express (x+1)(x+1) in standard quadratic form.

X^2 + 2 + 2x

x*x= x^2 1*1=1 x*1 = x and x*1= x

Simplify

Sorry guys it's actually
x^2 + 2x + 1
Because (x+1)(x+1) can be written either as x(x+1)+1(x+1) or (x+1)^2. (I'm sure there are other ways too but they're the ways I use!) Those ways show clearly when worked out that it's a 1 instead of a 2 as the constant! :)

1. 0.3 •4 is the same as 4 groups of 0.32. 7•0.8 is the same as 7 groups of 0.83. it increases by 0.5 every time, so 0.5x4 it increases by 0.9 every time, so 0.9x5. 0.9•12=10.86. 0.47•5=2.35i can finish the next ones in a separate post

It is 198,87032,750 + 375 = 33145 so, we take the 6% and we make it a decimal (0.6) and multiply that, then that is your answer