Question

Evaluate -a^2 + C^2 when c =-4

Answer 1

a=√c3+4 or a=−√c3+4

c=√a2−4 or c=−√a2−4

Step-by-step explanation:

Let's solve for c.

−a2+c2=−4

Step 1: Add a^2 to both sides.

−a2+c2+a2=−4+a2

c2=a2−4

Step 2: Take square root.

c=√a2−4 or c=−√a2−4

Let's solve for a.

−a2+c2=−4

Step 1: Add -c^2 to both sides.

−a2+c2+−c2=−4+−c2

−a2=−c2−4

Step 2: Divide both sides by -1.

−a2

−1

=

−c2−4

−1

a2=c2+4

Step 3: Take square root.

a=√c2+4 or a=−√c2+4