.Subtract.(3a – 5b – c) – (6b – 3c – 2d)

Simplify.-4(x-2y-1)-4

Multiply.(x – 12)(x + 12)

Find the LCM.63, 14

Add.(5×2 + 2xy + y2) + (2×2 + 6xy – y2) + (x2 + xy – y2)

Multiply.(x + 2)(x – 7)

Multiply.10×7(8×3 + 5×2)

Find the LCM.28, 21

Solve using the principle of zero products.b(b + 16) = 0

Simplify.5