factor sqrt(75)-4sqrt(18)+2sqrt(32)
Let's calculate: 75 -4×18 + 2×32
ℹ75 = 5×3‖18 = 3×2‖32 = 4×2
5×3 -4×3×2 + 2×4×2
ℹ4×3 = 12‖2×4 = 8
5×3 -12×2 + 8×2
▶Factored expression:   5×3 -4×2