Question

Find the product of (3x + 7y)2

Answer 1

start with \[(3x+7y)(3x+7y)\] and do the usual four multiplications

Answer 2

9x^2-42xy+49y^2 ??

Answer 3

this is the answer
y= 2-3x over 7

Answer 4

where did the minus sign come from?

Answer 5

your answer would be correct, except you put \(-42xy\) and there is no minus sign, so it should be \(+42xy\)

Answer 6

Its 2

Answer 7

oops

Answer 8

thanks for telling me that:
)

Answer 9

;)