Question

Help with? 7-3x^2=(x+2)^2-6 I can't find the solutions..

Answer 1

the equation -4x^2-4x+9=0;
so use the quadratic formula...and u'll get the answers as,
x=(4+4*sqrt(10))/-2*4 and x=x=(4-4*sqrt(10))/-2*4
u know what and how to use quadratic formula ?

Answer 2

no.

Answer 3

so 3/5 and 2/3

Answer 4

ok first post ur options...please

Answer 5

1/5, 1/3, 3/5, 1/2, 2/3, and 4/5.

Answer 6

7-3x^2 = x^2+4x+4-6

Get all terms on one side

4x^2+4x-9=0

Solve using graphing calculator, and finding where y = 0

x=1.081 or x= -2.081

Answer 7

the final simplified equation is x^2+x-9/4=0
u'll find that none of the choices satisfy...believe me . the answer i gav earlier is right...u can cross check with anyone..

Answer 8

7-3x^2=x^2 +4x +4 -6
7-3x^2 = x^2 +4x -2
0 =4x^2+4x-9 now use the formula
x=-b+ or - sqr root(b^2 - 4 ac)/2a
a=4, b=+4, c=-9
x=--4+-sqr root(16-4(4)(-9)/2(4)
=+4+-sqr root(16+144)/8
=(4+-sqr root (160))/8
=4/8 +- (sqr root 160)/8
=1/2 +- 1/2(sqr root 10)

Answer 9

so shaunlampert also got the same answer :)

Answer 10

because of the sqr root 10 the number cannot be represented as a fraction.
Hence none of the choices satifies the equation as suggested by brackett