Question

Márciotiff responde a letra B pra mim de novo?

Answer 1

b) $f(x)=- x^{2} +5x+6 \\ f( \sqrt{2}) =-( \sqrt{2} )^{2} +5( \sqrt{2})+6 \\ f( \sqrt{2})=-2+5 \sqrt{2}+6 \\ f( \sqrt{2} )=4+5 \sqrt{2}$