Question

Simplify.
−3(9x − 4y)(3x − 7y)

do i need to multiply the -3 to both or just the first?

Answer 1

Just the first...

Answer 2

ok then after that add the like terms?

Answer 3

use the (a-b)^2 =a^2-b^2

Answer 4

-3(27x^2-7*9*x*y-4*3*x*y+28*y^2)= -3*27*x^2+3*7*9*x*y+3*3*4*x*y-3*28*y^2

Answer 5

ok

Answer 6

dont do what rohangrr said (a-b)^2 = (a-b)*(a+b)

Answer 7

http://www.wolframalpha.com/input/pod.jsp?id=MSP40291a1775201gach10d00005a33b38a5i00fe88&s=15&button=1

Answer 8

foil the binomials then factor the -3 through or factor the -3 into one of the binomials and then foil

Answer 9

ok