1.find the possible value or values of z in the quadratic equation z2-4z+4=0
2.find the value or values of x in the quadratic equation x2=6x-9
2006-08-22 14:55:04 · 6 answers · asked by Renegade 1 in Education & Reference ➔ Home Schooling
z^2 -4z+4=0
z^2-2z-2z+4=0
z(z-2)-2(z-2)=0
(z-2)(z-2)=0
z-2=0 z-2=0
z=2,z=2(this equation has repeated roots.
x^2=6x-9
x^2-6x+9=0
x^2-3x-3x+9=0
x(x-3)-3(x-3)=0
(x-3)(x-3)=0
x-3=0,x-3=0
x=3,x=3(this equation also has repeated roots.
2006-08-22 21:44:53 · answer #1 · answered by flori 4 · 1⤊ 0⤋
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2016-11-26 23:55:23 · answer #2 · answered by kavanagh 4 · 0⤊ 0⤋
z2-4z+4
= (z-2)^2
z = 2
x = -3
2006-08-22 14:57:52 · answer #3 · answered by vin 3 · 0⤊ 0⤋
1. 56
2. 73
2006-08-22 14:56:37 · answer #4 · answered by Anonymous · 0⤊ 0⤋
1. ans x = -2
2. ans. x = 3
2006-08-22 15:02:12 · answer #5 · answered by Anonymous · 0⤊ 0⤋
the first one is (z+2i)(z-2i)...so the values of Z are those.....and the second one is 3...since the thing factored is (-x+3)(x-3)
2006-08-22 15:04:13 · answer #6 · answered by Charishma S 3 · 0⤊ 0⤋