Question

answer the question please

Answer 1

a) (a+b)²=a²+2ab+b²
(a+b)²=3²+2×3×4+4²
=9+28+16
=53
b) (a-b)²=a²-2ab+b²
=3²-2×3×4+4²
=9-28+16
=35
c) (a+b) (a-b)=a²-b²
(3+4) (3-4)=3²-4²
=9-16
=7



=7