3 is real 4th roots of 81
Answer:
what are the statements
Step-by-step explanation:
Multiply complex numbers 5+6i and 5-6i in the same way as you multiply binomials.
By definition, i² is -1.
Do the multiplications.
Now cancel -30i & +30i
Now the equation becomes
________
Hope it helps.
ŕάίήвόώşάĻţ2²2²
Answer:
D
Step-by-step explanation:
Given the 2 equations
4x - 5y = 18 → (1)
3x - 2y = 10 → (2)
Multiplying (1) by 3 and (2) by - 4, then adding will eliminate the x- term
12x - 15y = 54 → (3)
- 12x + 8y = - 40 → (4)
Add (3) and (4) term by term to eliminate x, that is
- 7y = 14 ( divide both sides by - 7 )
y = - 2
Substitute y = - 2 into either of the 2 equations and solve for x
Substituting into (1)
4x - 5(- 2) = 18
4x + 10 = 18 ( subtract 10 from both sides )
4x = 8 ( divide both sides by 4 )
x = 2
solution is (2, - 2 ) → D
