Question

a) (a+3x)² 
b) (xy+p³)²
c) (xy+5)²

Answer 1

a) (a+3x)²
(a)² +2.(a).(3x) +(3x)²
a² +6ax +9x²

ou

(a +3x) . (a + 3x)
a² +3ax +3ax +9x²
a² +6ax +9x²


b) (xy+p³)²
(xy)² +2.(xy).(p³) + (p³)²
x²y²+ 2xyp³ + p⁶

ou

(xy+p³) . (xy+p³)
x²y² + xyp³ +xyp³ +p⁶
x²y² +2xyp³ + p⁶


c) (xy+5)²
(xy)² +2.(xy).(5) + (5)²
x²y² +10xy +25

ou

(xy +5) . (xy +5)
x²y²  +5xy +5xy +25
x²y² +10xy +25

Answer 2

a) (a+3x)² = a^2 + 6ax + 9x^2 
b) (xy+p³)² = x^2y^2 + 2p^3xy + p^6
c) (xy+5)² = x^2y^2 + 10xy + 25