Question

Find Quadratic polynomial having zeros as 1 and -2 .

Answer 1

step by step as explanation in the picture

Answer 2

if two roots of qurdatic polynomial is 1 and -2 .the equation will be

${x}^{2} - (sum \: \: of \: \: roots )x - (product \: of \: roots) \\ {x}^{2} - (1 - 2)x + ( - 2 \times 1) \\ {x}^{2} - ( - 1)x + ( - 2) \\ {x}^{2} + x - 2$