Factorise 3x squared + 5x + 2 plz show working : )

3x²+5x+2
the factor of 3 is 1 and 3, the factors of 2 is 1 and 2. 
line them up this way:
1    1
3    2
multiply them diagonally and add up the products: 1*2+1*3=5, exactly what we need for 5x, so the factored form is (x+1)(3x+2)

1. isolate the variable, in this case, d. subtract 35.5 on both sides of the equation.2. 52 subtracted by 35.5 is 16.53. therefore your answer would be d= 16.5this is the basics of pre algebra, isolating variable through adding, subtracting, multiplying, and dividing, if you have any other questions to ask just comment!