Question

(-5i)(-3i) quadratic equation simplified

Answer 1

If you remove the parentheses... and the probably will become this → 5i 3i

Next, 5i × 3i → 15ii

Make it into a exponent [rule] →
`5i^(2)`

Then,
`i^(2)` → -1

((-1)) 15

Therefore, your answer for this equation is -11