Question

find the square of 3a-7​

Answer 1

Step-by-step explanation:

Squaring,

(3a+7b)

2

=(3a)

2

+2(3a)(7b)+(7b)

2

=9a

2

+42ab+14b

2

Answer 2

Step-by-step explanation:

( a - b )^2 = a^2 + b^2 - 2ab

( 3a - 7 )^2 = (3a^2) - (2×3a×7) + (7)^2

=9a^2 - 42a + 49

thq