What is the HCF and LCM of the following terms: a^2 + 4ab + 4b^2 - c ^ 2 AND a^2 - 4b^2 + ac - 2bc

The data in the table represent the height of an object over time. which model best represents the data? height of an object time (seconds) height (feet) 05 1 50 2 70 3 48 quadratic, because the height of the object increases or decreases with a multiplicative rate of change quadratic, because the height increases and then decreases exponential, because the height of the object increases or decreases with a multiplicative rate of change exponential, because the height increases and then decreases

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?

Parabolas y=−2x^2 and y=2x^2 +k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.