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# Common Core Standard HSN-CN.C.7 Questions

Solve quadratic equations with real coefficients that have complex solutions.

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Expand and simplify $(10-12i)(10+12i)$.
1. $100-144i$
2. $244$
3. $244i^2$
4. $244i$
Expand and simplify: $(10-7i)(10+7i)$.
1. $149$
2. $-149i$
3. $100 - 49i$
4. $140i^2$
Expand and simplify: $(10-10i)(10+10i)$.
1. $0$
2. $100-100i$
3. $200$
4. $-200i$
After expanding $(10-15i)(10+15i)$, what will the imaginary part be?
1. $150i$
2. $300i$
3. $-300i$
4. $0$
Expand and simplify: $(5-10i)(5+10i)$.
1. $-125$
2. $25 - 100i$
3. $150i$
4. $125$