Question

Kurangkanlah beserta caranya
a. 4y+2x-7 dari y+3x +2
b. 5w-xy-2z dari 8w+4xy+z

Answer 1

A) (y + 3x + 2) - (4y + 2x - 7)
= y - 4y + 3x - 2x + 2 - (-7)
= - 3y + x + 9

b) (8w + 4xy + z) - (5w - xy - 2z)
= 8w - 5w + 4xy - (-xy) + z - (-2z)
= 3w + 5xy + 3z

Answer 2

A. y + 3x + 2 - (4y + 2x - 7) = y + 3x + 2 - 4y - 2x + 7 = y - 4y + 3x - 2x + 2 + 7 = - 3y + x + 9
b. 8w + 4xy + z - (5w - xy -2z) = 8w + 4xy + z - 5w + xy + 2z = 8w - 5w + 4xy + xy + z + 2z = 3w + 5xy + 3z