18
The square root of two times the square root of two equals two
That factors to (x + 3)(x^2 - 3x + 7)Setting those equal to zero leaves one real root (-3) and one complex root: one half times (three minus i times the square root of 19) where i is the square root of negative one.
480
e^(-2x) * -2 The derivative of e^F(x) is e^F(x) times the derivative of F(x)
1/2
other way round four times one eighth = one half 4/8 = 1/2
2/3 x 3/8=1/4
Three times one eighth is three eighths.
two and one eight times one fourth = 2 1/8 * 1/4 = 17/32
One forth is twice as large as one eighth. One forth divided by two is one eighth, and one eighth times two is one forth.
100 multiplied by 1/8 is 12 1/2 or 12.5
2/4 x 1/8 is 1/16
1/8 * 1/8= 1/64 in fraction
2.25
2/5 x 1/8 = 2/40 = 1/20 one twentieth
2-1 x 2-2 = 2-1 + -2 = 2-3 = 1/8, or one eighth.