A) 169p⁴qr÷ (-13pq³r)
b) 3(x +2y) +5x - (y + 7)
c (3x –4)( 5x- 1)
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a) 169 p⁴qr 13×13×p×p³×q×r 13p³
- ------------- = - ---------------------- = - ------
13pq³r 13×p×q×q²×r q²
b) 3(x+2y)+5x-(y+7)
3x+6y+5x-y-7
8x+5y-7
c) (3x-4)(5x-1)
5x(3x-4) -1(3x-4)
15x-20-3x+4
12x-16
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