Question

2.tính gtbt

A=5-4x(x-2)+4x^2 tại x=4

Answer 1

\(A=5-4.4\left(4-2\right)+4.4^2\)

\(=5-32+64\)

\(=37\)

Answer 2

Khi x=4

\(A=5-4x\left(x-2\right)+4x^2\)

\(\Rightarrow A=5-4.4\left(4-2\right)+4.4^2\)

\(\Rightarrow A=5-4.4.2+4.16\)

\(\Rightarrow A=5-32+64\)

\(\Rightarrow A=37\)

tíc mình nha