You can double the product of 9 and 4 to get to the product of 9 and 8
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.
Answer:
5
Step-by-step explanation:
Step-by-step explanation:
It is 64*0.32=20.48 minutes or 20.5 minutes.
