Question

(1,2xy^3-0,8xy)÷xy при y=-2

Answer 1

0,4ху(3у²-2)/ху=0,4(3у²-2)=0,4(3*4-2)=0,4*10=4

Answer 2

To evaluate the expression (1, 2xy^3 - 0.8xy) ÷ xy when y = -2, we simply substitute -2 for y and simplify:

(1, 2xy^3 - 0.8xy) ÷ xy = (1, 2x(-2)^3 - 0.8x(-2)) ÷ x(-2) = (1, -16x + 1.6x) ÷ (-2x) = (-14x) ÷ (-2x) = 7

Therefore, the value of the expression (1, 2xy^3 - 0.8xy) ÷ xy when y = -2 is 7.