Simplify the expression. Write your answer as a power.
(−4)5⋅(−4)7

Small kingdoms on the iberian peninsula fought to take land back from the moors during which event? the hundred years’ war the wars of the roses the reconquista the great schism

What number should be added to the expression x^2+3x+ in order to create a perfect square trinomial? 3/2 3 9/4 9

I'm confused on this could anyone me and show me what i need to do to solve it.