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3+2*5:4:5°-3*4+3*4:2-3
3+10:4:1-12+12:2-3
3+10:4:2-3
3+10:2-3
3+5-3
5
B)
(2x-3)(x-6)
2x²-12x-3x+18
2x²-15x+18
C)
c(a-b)
6x-5(3x²+2x-3-5x²-3x+8)
6x-5(-2x²-x+5)
-12x³-6x²+3x+10x²+5x-25
-12x³+4x²+8x-25
ac+b
(3x²+2x-3)(6x-5)+5x²-3x+8
(18x³-15x²+12x²-10x-18x+15)+5x²-3x+8
18x³-3x²-28x+15+5x²-3x+8
18x³+2x²-31x+23
D)
30:{(15-6):[3+(18-3)]:5}
30:{9:[3+15]:5}
30:{9:18:5}
30:2:5
15:5
3
9)
-6x+8x²-2-2x³+x-3x²
-2x³+5x²-5x-2
4x³-11x²+13x-1-2x³+5x²-5x-2
2x³-6x²+8x-3
R// El tercer lado mide 4x³-11x²+13x-1