∵a and b are roots of equation x2+ax+b=0,a=0,b=0∴a2+a⋅a+b=0⇒2a2+b=0⇒b=−2a2 and b2+a⋅b+b=0∴4a4−2a3−2a2=0 [Using (i)] 2a2(2a2−a−1)=02a2=0 or 2a2−a−1=0a=0 or 2a2−2a+a−1=0⇒a=0 or =(2a+1)(a−1)=0⇒a=0 or a=−21 or a=1∴a=0⇒b=0a=−21⇒b=21a=1⇒b=−2 Hence, required value of a and b are 1 and −2 respectively.