Answer:
38x^2 +14x -6
Step-by-step explanation:
SA = 2(LW +WH +LH)
= 2((4x +3)(x) +(x)(3x -1) +(4x +3)(3x -1))
= 2(4x^2 +3x +3x^2 -x +12x^2 +5x -3)
= 38x^2 +14x -6
