How can heat produce more heat? 10 points

For climates with moderate heating and cooling needs, heat pumps offer an energy-efficient alternative to furnaces and air conditioners. Like your refrigerator, heat pumps use electricity to move heat from a cool space to a warm space, making the cool space cooler and the warm space warmer.

Since wxyz is 4, halfof that would be 2.

5×^2+20-15 or -(5x^2-20+15)