Question

напиши пожалуйста срочно надо!!

Answer 1

$(3x-y)^2=9x^2-6xy+y^2\\\\(-6n-2)^2=(6n+2)^2=36n^2+24n+4\\\\(-7c+8x^3)^2=(8x^3-7c)^2=64x^6-112x^3c+49c^2\\\\(b-13a)(13a+b)=b^2-169a^2\\\\(-5m^4+3)(3+5m^4)=(3-5m^4)(3+5m^4)=9-25m^8$