Question

x^2-4x+___=(__)^2 what numbers would make this true ?

Answer 1

You need to do whats called completing the square. when you have a quadratic equation in the form:
\[x^2+bx+c\]
for it to be a square, c must be:
\[c = (\frac{b}{2})^2\]

Answer 2

+4; this would give (x-2)^2

Answer 3

Would the 2 be negative or positive ?

Answer 4

negative. (x-2)(x-2)=x^2-4x+4

Answer 5

- Thanks , alot .

Answer 6

no prob :)