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By subbing in a=1 b=1 and c=-6 into the quadratic formula, you should get two solutions of x which are x = 2 and x = -3

Concentrate on the x^2+4x. Halve the 4 or any number that occupies that space. Equals 2 in this case. Put (x+2)^2 and that is your first term. Expand the brackets= x^2 + 4x + 4. Don't want the extra + 4 a...

(7/2) - 7²(7/2) - (98/2)= -(91/2)

To find the mean, we add all the numbers and divide by how many numbers there are. 15+9+12+13+6+15+18+10+11+21 = 130130/10 = 13The mean is 13.To find the median, we first arrange the numbers into order: ...

The first step is to reverse any addition or subtraction. Gather all terms being added on one side. Remember that crossing over from one side of the equal sign to the other negates the symbol before the n...