A+b={2;-4;4}
|a+b|=√(2²+4²+4²)=√36=6
1/6 × корень из 36 -1 =:
1/6 × (-6) - 1 или 1/6 × 6 - 1
-1 - 1 или 1 - 1
-2 или 0
Ответ: -2 или 0.
1)у^4:у (у^2)^8=у^3*у^6=у^9
2 )х^2у (5-8+1)=-2х^2у
3)16а^4в^8*8а^6в^3=128а^10в^11
4)м^28/м^27м=1
1. А (2,5а-3а)^2=(-0,5a)^2 = 0,25a^2
Б (2а^2-3а)^2= 4a^4 - 12a^3 + 9a^2
В (2-ав)(2+ав)= 4 - a^2b^2
Г (ху^2 + 3х)(х^2у^4 - 3х^2у^2 + 9х^2) = <span><span>x^3</span><span>y^6</span>+<span>x^3</span><span>y^4</span><span>(−3)</span>+<span>x^3</span><span>y^2*</span>9+3<span>x^3</span><span>y^4</span>−9<span>x^3</span><span>y^2</span>+27<span>x^3</span>=</span><span><span>x^3</span><span>y^6</span>+<span>x^3</span><span>y^2*</span>9−9<span>x^3</span><span>y^2</span>+27<span>x^3</span>= </span><span> x^3y^6+9x^3y^2−9x^3y^2+27x^3= </span><span><span><span>x^3</span><span>y^6</span>+27<span>x^3</span></span></span>
2.
А (5х+7,5n)^2= 25x^2+ 75xn + 56,25n^2
Б (5х^6+2х^2у^5)^2=25x^12 + 20x^8y^5 +4x^4y^10
В (9ху-5х^2)(9ху+5х^2)=81x^2y^2 - 25x^4
Г (а^3-а^2b)(a^6+a^5b+a^4b^2)= a^9 + a^8b + a7b^2 - a^8b - a^7b^2 -a^6b^3 = a^9 - a^6b^3