i will medal and fan Please help!!

: Which of the equations below have only real solutions?
a. (x-7)^2=0
b. 3x^2+7=4x
c. x=(3±√(-3))/2
d. x=(-18±√(〖18〗^2-4(3)(4)))/(2(3))
e. (x+2)(x-6)=-18
f. x^2+8x=-8

Question

i will medal and fan Please help!!


: Which of the equations below have only real solutions?
a.	(x-7)^2=0
b.	3x^2+7=4x
c.	x=(3±√(-3))/2
d. 	x=(-18±√(〖18〗^2-4(3)(4)))/(2(3))
e. 	(x+2)(x-6)=-18
f.	x^2+8x=-8

mathmale · Answer

Harry Potter would not need to offer "fan and medal" for help.  It's just not necessary to do that.

You may need to go thru the equations listed and determine, one by one, which ones have only real solutions.

Example:  (x-7)^2=0 can be expanded.  In expanded form we have x^2 - 14x +49 = 0.

This has two solutions.  (Try it.)