Please help.
Simplify the expression using imaginary numbers.
√ -49 * √ -81

-63

Step-by-step explanation:

i is equal to √ -1

√ -49

√ 49 * √ -1

7*i

7i

√ -81

√ 81 * √ -1

9*i

9i

7i*9i

63i^2

i^2 equals -1

63*-1

-63

-63

Step-by-step explanation:

sqrt(-49) = 7i

sqrt(-81) = 9i

7i × 9i

63i²

-63

step-by-step explanation:

always plug in x. in this case, x equals 4.

i'm going to first solve 4(2+3x)

1) 4(2+3(4)) use pemdas to solve.

i'm going to multiply whats in the parenthesis first, so 3 times 4=12.

2)4 (2+12) i'm then going to multiply 4 by both numbers in the parenthesis (because multiplying comes before adding)

4 times 2= 8.   4 times 12= 48

4) (8+48)= 56 (answer)

i'm then going to solve 8+12x and plug in 4 for x.

1) 8 +12(4)

multiplying comes before adding, so i'm gonna multiply 12 and 4.

12 times 4= 48.

2) 8+48=56

both equal the same!