Express the product of x+1 and x+8 in standard quadratic form.

(x+1)*(x+8) = x^2 + 9x + 8

(x + 1)(x + 8) x(x + 8) + 1(x + 8) x*x + 8*x + 1*x + 1*8 x² + 8x + x + 8 x² + 9x + 8 Hope this explains it.