Answer:
a= 5, b= 12
Step-by-step explanation:
a=5
b=12
idk
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3x + 5y = 21 * (-4) •••••• -12x -20y = -84 (a)
4x - 2y = -24 * (3) •••••• 12x -6y = -72 (b)
(a) + (b)
-26y = -156
y = 6
3x + 5 * 6 = 21
3x = 21 - 30
3x = -9
x = -3
-40+44i
4(-10+11i) = -40+44i
hope its clear
