Question

please help asap 25 pts

Answer 1

B. you should get x=1.5311, and x=-6.5311 when you solve for x.

Answer 2

x^2 + 5x - 10 = 0 can be re-written as x^2 + 5x + (5/2)^2 - (5/2)^2 = 0.

Then, x^2 + 5x + 25/4 = 10 + 25/4 = (40+25) / 4

(x+5/2)^2 = 65/4, so x+5/2 = plus or minus sqrt(65/4) = plus or minus 4.031.

Then x = -2.5 plus or minus 4.031, or  x = -2.5+4.031 = 1.53 and
                                                             x = - 2.5 - 4.031 = -6.53      (answers)