Question

a+b eqal 9 ab equal 12 find asqare+bsqure

Answer 1

$(a + b) {}^{2} = {9}^{2}$
${a}^{2} + {b}^{2} + 2ab = 81$
${a}^{2} + {b}^{2} = 81 - 2 \times 12$
${a}^{2} + {b}^{2} = 67$