Question

simplify
a (pq+4)×(pq-4)
b (3y+4z)²
c (m²-n²)²​

Answer 1

a) (pq + 4) × (pq - 4)

=(pq + pq) × (4 - 4)

= (pq^2) × 0

= 0

b) (3y + 4z)^2

= (3y^2) + (4z^2)

c) (m^2 - n^2) ^2

= [m^(2×2)] - [n^(2×2)]

= m^4 - n^2

NOTE:-

' ^ ' this symbol means 'power of' / 'exponent'

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