Question

plz answer my 2 question​

Answer 1

Step-by-step explanation:

Hope this will help you

Answer 2

Answer:

hope it will help

Step-by-step explanation:

q.no. 13

Here,

3x+2y = 12

Squaring on both side

(3x+2y)² = 12²

(3x)²+2.3x.2y+(2y)²= 144

9x²+12xy+4y² = 144

9x²+12×6+4y² = 144

9x²+72+4y² = 144

9x²+4y² = 144-72

9x²+4y² = 72 ans

Q.no. 14

(i) (3a+4b)³

= 3a³+4b³-3.3a.4b(3a+4b)

(ii) (5p-3q)³

= 5p³-3q³+3.5p.3q(5p-3q)