Phan tich da thuc thanh nhan tu a) 81x^4 + 4 b) x^4 + 2013x^2 + 2012x + 2013 giai ho em vs moi ng 12/08/2021 Bởi Rylee Phan tich da thuc thanh nhan tu a) 81x^4 + 4 b) x^4 + 2013x^2 + 2012x + 2013 giai ho em vs moi ng
a) 81x^4 + 4 = 81x4 +4 = (9x² +2)² – 36x² = (9x² +2 -6x)( 9x² +2 +6x) b) x4 + 2013x2 +2012x +2013 = x4 + 2013x² + 2013x – x+ 2013 = x4 – x + 2013x² + 2012x + 2013 = x(x^3-1) + 2013(x² +x+1) = x(x-1)(x²+x+1) + 2013(x² +x+1) = (x² +x+1)(x² – x +2013) Bình luận
a) 81x^4 + 4 = 81x4 +4 = (9x² +2)² – 36x² = (9x² +2 -6x)( 9x² +2 +6x) b) x4 + 2013x2 +2012x +2013 = x4 + 2013x² + 2013x – x+ 2013 = x4 – x + 2013x² + 2012x + 2013 = x(x^3-1) + 2013(x² +x+1) = x(x-1)(x²+x+1) + 2013(x² +x+1) = (x² +x+1)(x² – x +2013) Chúc bạn học tốt ^^ Bình luận
a) 81x^4 + 4 = 81x4 +4 = (9x² +2)² – 36x²
= (9x² +2 -6x)( 9x² +2 +6x)
b) x4 + 2013x2 +2012x +2013 = x4 + 2013x² + 2013x – x+ 2013
= x4 – x + 2013x² + 2012x + 2013
= x(x^3-1) + 2013(x² +x+1)
= x(x-1)(x²+x+1) + 2013(x² +x+1)
= (x² +x+1)(x² – x +2013)
a) 81x^4 + 4 = 81x4 +4 = (9x² +2)² – 36x² = (9x² +2 -6x)( 9x² +2 +6x)
b) x4 + 2013x2 +2012x +2013
= x4 + 2013x² + 2013x – x+ 2013
= x4 – x + 2013x² + 2012x + 2013
= x(x^3-1) + 2013(x² +x+1)
= x(x-1)(x²+x+1) + 2013(x² +x+1)
= (x² +x+1)(x² – x +2013)
Chúc bạn học tốt ^^