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b) 3x²y+6x⁵y⁴-15x⁴y⁵ = 3x²y(1+2x³y³-5x²y⁴)
c) 10ax-20bx+6ay-12by = 10x(a-2b)+6y(a-2b) = (a-2b)(10x+6y)
d) 40az-50aw-12bz+15bw =10a(4z-5w)-3b(4z-5w) = (4z-5w)(10a-3b)
e) 20xh-35xk+12yh-21yk = 5x(4h-7k)+3y(4h-7k) = (4h-7k)(5x+3y)
f) 16a²x⁴-25b⁴y² = (4ax²-5b²y)(4ax²+5b²y)
g) z²+9z+14 = (z+2)(z+7)
h) x²+x-6 = (x-2)(x+3)
i) 4x²+12xy+9y² = (2x+3y)²
j) 6a²+11a+10 = no se puede factorizar
k) 4x²-14xy+12y² = (2x-3y)(2x-4y)
l) 2x²+3xy-2y² = (2x-y)(x+2y)
m) 9a²-30ab-25b² = No se puede factorizar
n) 4x²-14xy+12y² = 2(x-2y)(2x-3y)
o) 2x² + x - 21 = (x-3)(2x+7)