Quis Aljabar... pake caranyahh..

=(-5x+8y)^2
=(-5x+8y)(-5x+8y)
= (-5x)(-5x) +(-5x)(8y) +(-5x)(8y)+(8y)(8y)
= 25x^2 -40xy -40xy +64y^2
= 25x^2 -80xy +64y^2

^bacanya pangkat, jawabannya yg E

28. (-5x + 8y) (-5x + 8y)
25x^2 - 40xy - 40xy + 64y^2
25x^2 - 80xy + 64y^2
semoga membantu