Question

1) efetue

a) (7-3c)²

b) (-4x-3y)²

c) (5x-2y)²

Answer 1

a) (7-3c)(7-3c) : 49-21c-21c+9c² : 9c²-42c+49

b) (-4x-3y)(-4x-3y) : 16x²+12xy+12xy+9y² : 16x²+24xy+9y²

c) (5x-2y)(5x-2y) : 25x²-10xy-10xy+4y² : 25x²-20xy+4y²