Practice problem
Which of the following expressions are perfect square trinomials?
16x2+6416x^{2}+6416x2+64
16x2+64+6416x^{2}+64+6416x2+64+64
16x2+64x−6416x^{2}+64x-6416x2+64x−64
4x2+9y24x^{2}+9y^{2}4x2+9y2
4x2+12xy+9y24x^{2}+12xy+9y^{2}4x2+12xy+9y2
4x2+6xy+9y24x^{2}+6xy+9y^{2}4x2+6xy+9y2
Type a concept, like “slope” or “photosynthesis”.
