m1 ial edexcel june 2014 answers
t (-4x) dx = -2x^2 \] \[ \int 3 dx = 3x \] Evaluate between 1 and 4: \[ \left[\frac{x^3}{3} - 2x^2 + 3x\right]_1^4 \] At \( x=4 \): \[ \frac{64}{3} - 2 \times 16 + 3 \times 4 = \frac{64}{3} - 32 + 12 \] At \( x=1 \): \