X2 – 4x + 4 = 0
solve by factorising. i know the answer is x = 2 but im not sure

What adds to be the bottom number but also multiplies to be the top number with 8 on the bottom and 15 on top

Solve the system of equations using the substitution method. {y=−3x+7x=−2y−16 enter your answers in the boxes.

Plzz ! if you were constructing a triangular frame, and you had wood in the length of 4 inches, 4 inches, and 7 inches, would it make a triangle? would you be able to create a frame from these pieces of wood? yes or no? = explain your mathematical thinking/show your work: