Question

simplify a^4+b^4 if a+b= -b/a and ab=c/a

Answer 1

${( {a}^{2} + {b}^{2}) }^{2} - 2 {a}^{2} {b}^{2}$
$(( { {a + b})^{2} - 2ab) }^{2} - 2 {a}^{2} {b}^{2}$
now put the value of a+b and ab
$(( { { \frac{ - b}{a} ) }^{2} - 2( \frac{c}{a} ) })^{2} - 2 ({ \frac{c}{a} })^{2}$
solve this equation,for answer