so, just plug in the numbers
4(3)(-4) + 2(5) = ?
4xy+2k for x=3,y=-4 and k=5
3 answers
4 * 3 * -4 + 2 * 5 = -38
4xy+2k
Substitute the numbers for the letters
(4 * 3 * -4) + (2 * 5)
-48 + 10 = -38
Substitute the numbers for the letters
(4 * 3 * -4) + (2 * 5)
-48 + 10 = -38