Question

square of 3x + 4y is _ (a) 9x²+16y² (b)6x²+8y² (c)9x²+16y²+24xy (d)9x²+16y²-24xy​

Answer 1

Answer:

(a-b)^2=a^2 +b^2 - cab

(3x-4y)^2 = (3x)^2+(4y)^2 - 2(3x)(4y)

= 9x^2+16y^2 - 24xy

D) is correct

Answer 2

Answer:

(3x+4y)^2=?

Step-by-step explanation: we know that ,

                                             (a+b)^2=a^2+b^2+2ab

Here Let, a=3x b=4y

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

               =9x^2+16y^2+24xy.(c)