Question

HELPPPPP

Considerando a = -12,b = -4 e c = 22, calcule o valor numérico das expressões algébricas a seguir​

Answer 1

Resposta:

$a=-12\\ b=-4\\ c=22\\ \\ a)\\ \\ a^{2}+b^{2}+c^{2} =(-12)^{2}+(-4)^{2} +22^{2} =\\ \\ 144+16+484=644\\ \\ b)\\ \\ b^{3}- a^{3} =(-4)^{3} -(-12)^{3} =\\ \\ \left[\begin{array}{ccc}(-4).(-4).(-4)-(-12).(-12).(-12)\end{array}\right] =\\ \\ \left[\begin{array}{ccc}(-64)-(-1728)\end{array}\right] =-64+1728=1664$

$c)\\ \\ a^{2} -3bc=\\ \\ (-12)^{2} -3.(-4).22=\\ \\ 144-(-264)=\\ \\ 144+264=408\\ \\ d)\\ \\ a^{2}-b^{2}-c^{2} =\\ \\ (-12)^{2} -(-4)^{2} -22^{2} =\\ \\ 144-16-484=-356$