Simplify the expression
(-3i) (-4i)

12
-12
12i
-12i

225x²+4=0

225x²=0-4

225x²=-4

x²=-4/225

x=±√-4/225

the first one is x^2+2x+2

the second one is x^2+4

the last one is x^2-4x+8

= 5

step-by-step explanation:

to find the 15th term substitute n = 15 into the nth term formula

= (- 3 × 15 ) + 50 = - 45 + 50 = 5