Can you please help me with this

Algebra
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1. Solve each quadratic equation using the method of your choice. Find exact solutions. 1. -1.6x^2 - 3.2x + 18 = 0 2. 10x^2 + 3x = 1 3. X^2 + 8x - 48 = 0
May 20th, 2015

1. -1.6x^2 - 3.2x + 18 = 0

D=(-3.2)^2 - 4*(-1.6)*18=10.24+115.2=125.44

x1=(3.2+11.2)/2*(-1.6)=4.5 and x2=(3.2-11.2)/2*(-1.6)=-2.5

2. 10x^2 + 3x = 1

2. 10x^2 + 3x -1=0

D=9+40=49

x1=(-3+7)/20=1/5 and x2=(-3-7)/20=-1/2

3. X^2 + 8x - 48 = 0

D=64+192=256

x1=(-8+16)/2=4 and x2=(-8-16)/2=-12

May 20th, 2015

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