5x+xy=x(5+y)
a⁴+2a²=a²(a²+2)
15a-5b=5(3a-b)
20ab-10ab²=10ab(2-b)
-7b-14b²=-7b(1+2b)
42a³-56b=14(3a³-4b)
15ab-3b=3b(5a-1)
159²-159×59=159×(159-59)=15900
0,4²+0,16×1,6=0,16×(1+1,6)=0,16×2,6=0,416
Ответ:
42a³-56b=
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5x+xy=x(5+y)
a⁴+2a²=a²(a²+2)
15a-5b=5(3a-b)
20ab-10ab²=10ab(2-b)
-7b-14b²=-7b(1+2b)
42a³-56b=14(3a³-4b)
15ab-3b=3b(5a-1)
159²-159×59=159×(159-59)=15900
0,4²+0,16×1,6=0,16×(1+1,6)=0,16×2,6=0,416
Ответ:
5x+xy=x(5+y)
a⁴+2a²=a²(a²+2)
15a-5b=5(3a-b)
20ab-10ab²=10ab(2-b)
-7b-14b²=-7b(1+2b)
42a³-56b=
15ab-3b=3b(5a-1)