Simplify the experssion and you get 10.
Hope this helps!
Notice that half of the coefficient of x is (1/2)(-4), or -2.
Then x^2 - 4x becomes
x^2 - 4x + 4 - 4 = 0, or (x -2)^2 = 4. Then x = -2 plus or minus 2, and the two roots are 0 and -4.
Thus, add 4 to both sides to obtain x^2 - 4x + 4 = 4.
One hundred eighty-seven and twenty-three thousandths
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The graph is shown in the attached image.
Six million and seventy two hundred. 6.0072 x 10*
*=6