Question

AJUDA PFV GENTEEE!!

Dada F: R-> R definida por f(x)=x² -2x determine o valor de A=f(-3)+3. f(1)-2 f (-5)​

Answer 1

$\large\boxed{\begin{array}{l}\sf f(x)=x^2-2x\\\sf f(-3)=(-3)^2-2\cdot(-3)\\\sf f(-3)=9+6=15\\\sf f(1)=1^2-2\cdot1=1-2=-1\\\sf f(-5)=(-5)^2-2\cdot(-5)\\\sf f(-5)=25+10=35\\\sf A=f(-3)+3\cdot f (1)-2f(-5)\\\sf A=15+3\cdot(-1)-2\cdot35\\\sf A=15-3-70\\\sf A=-58\end{array}}$