Math Question: if a equals 4,b equals 3,c equals -6,d equals 2 find the value of 2ab- 3cd

if a equals 4,b equals 3,c equals -6,d equals 2 find the value of 2ab- 3cd a=4 b=3 c= -6 d=2 This is simple substitution. You can get a whiteboard (they make foldable ones that fit in your pocket) you can write: 2ab- 3cd with each letter in a square 2ab- 3cd 2[a][b]-3[c][d] then erase a letter and write its numerical value in the square: 2[4][b]-3[c][d]= 2[4][3]-3[c][d]= 2[4][3]-3[-6][d]= 2[4][3]-3[-6][2] then simplify: 2[4][3]-3[-6][2]= 2*4*3-3*(-6)*2= 8*3-6(-6)= 24 - (-36)= 24+36=60
Answered On 05/27/2020 17:20