2 questions... Please help....?

0 ⤊

2 questions... Please help....?

1. Solve by using the quadratic formula:
x^2 = 7x - 9

2. Solve by using the quadratic formula:
4x^2 + 7x + 5 = 0

2007-08-24 06:55:44 · 3 answers · asked by casper5 3 in Science & Mathematics ➔ Mathematics

3 answers

1.) rearrange equation: x^2-7x+9=0
Then a=1, b=-7, c=9

2.) a=4, b=7, c=5

2007-08-24 07:01:19 · answer #1 · answered by Ed S 4 · 0⤊ 0⤋

x^2 - 7x - 9=0
a=1
b=-7
c=-9

delta=(-7)^2-4*1*(-9)=49+36=85
x1=(7+sqrt(85))/2
x2=(7-sqrt(85))/2

4x^2 + 7x + 5 = 0
a=4
b=7
c=5
discriminant=49-80
negatif
no roots

2007-08-24 14:01:42 · answer #2 · answered by iyiogrenci 6 · 0⤊ 0⤋

Sorry i would help but i dont no! Good Luck! <3

2007-08-24 14:03:07 · answer #3 · answered by eLp ♥ 2 · 0⤊ 0⤋