Question

Evaluate z^2−3z+4, when z = −4

Answer 1

Answer:

32

Step-by-step explanation:

(-4)^2 -3(-4) +4=16+12+4

=32

Answer 2

$\implies {\blue {\boxed {\boxed {\purple {\sf {32}}}}}}$

$\sf \bf {\boxed {\mathbb {STEP-BY-STEP\:\:EXPLANATION:}}}$

${z}^{2} - 3z + 4$

Plugging "$-4$" for all values of "$z$", we have

$= ({ - 4})^{2} - 3( - 4) + 4$

$= ( - 4 \times - 4) + 12 + 4$

$= 16 + 12 + 4$

$= 32$

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