Question Given a+b=2 , ab=1 , find value of a^2+b^2 Collected in the board: Perfect square polynomials Steven Zheng posted 2 years ago
Answer \because a+b=2Square both sides of the equation (a+b)^2=4a^2+b^2+2ab=4\therefore a^2+b^2 =4-2ab=4-2\cdotp 1=2 Steven Zheng posted 1 year ago