Factor the following using identities wherever necessary. 1) x2 + 8x
2 x² - 48
3) x²+x-2
4x²-9
5) x2 + 22x + 121
6) x2 - 8x + 16
7) x2 - 14x + 49
8) 2x - 14x
9) 10x2 - 14x + 18x4
10) 20a-b - 25ab

Here is their argument. given the obtuse angle x, we make a quadrilateral abcd with ∠dab = x, and ∠abc = 90◦, and ad = bc. say the perpendicular bisector to dc meets the perpendicular bisector to ab at p. then pa = pb and pc = pd. so the triangles pad and pbc have equal sides and are congruent. thus ∠pad = ∠pbc. but pab is isosceles, hence ∠pab = ∠pba. subtracting, gives x = ∠pad−∠pab = ∠pbc −∠pba = 90◦. this is a preposterous conclusion – just where is the mistake in the "proof" and why does the argument break down there?

On a piece of paper, graph . then determine which answer choice matches the graph you drew

What is the multiple zero and multiplicity of f(x) = (x ? 3)(x ? 3)(x + 5)? multiple zero is 3; multiplicity is 2 multiple zero is 5; multiplicity is 1 multiple zero is ? 5; multiplicity is 1 multiple zero is ? 3; multiplicity is 2