Solve the quadratic equation by completing of squares giving your answer to 3sf 11x2 –13x+3=0
x2 − 13/11 = −3/11 x2 −13/11 + (−13/11)2 = −3/11 + (−13/11)2(x − 13/11)2 = −3/11 + 169/121 =136/121x − 13/11 =±√136/121either x = √136/121 + 13/11 =11.66 +13 =2.242 11 11Or x = −√136/121 + 13/11 =−11.66 +13 = 0.1218 11
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