Это число - 969,
969 ÷ 3 = 323;
969 ÷ 17 = 57;
969 ÷ 19 = 51.
1. (√63-√28)*√7=(3√7-2√7)*√7
=√7*√7=7
2. √25a+√36a-√49a
=5a+6a-7a=4a
1.
1) 100m^6-0.81n⁴
2) a⁴- 0.04b^6
3) m^6-0.25
4) 4a²-16b²
5) 0.16a⁴-81b²
6) 100x²-10,5xy³-0,49y^6
2.
1) 16x^8-81y²= (4x⁴-9y)•(4x⁴+9y)
2) 0.01x^8-0.04y⁴=0.01(x⁴-2y²)•(x⁴+2y²)
Cos111=cos(180-69)=-cos69
sin(-10)=-sin10
(x-2)³=x³-6x<span>²</span>+4x+12
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