complete the following activitiey 2x+y=19 2x-3y=3 by cramer'e rule
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Answer:
2x+y=19
2x-3y=-3
a1 = 2 , a2 = 2 , b1 = 1 , b2 = 3 , c1 = 19 , c2 = -3
dx = | 19 1 |
| -3 -3 |
°Cross multiply
= [ 19*(-3) - (-3)*1 ]
= -57 + 3
= -54
dy = | 2 19 |
| 2 -3 |
° Cross multiply
= [ 2*(-3) ] - (19*3)
= -6 - 57
= -63
d = | 2 1 |
| 2 -3 |
° Cross Multiply
= [ 2*(-3) ] - ( 2*1 )
= -6 - 2
= -8
x = dx^d = -54^-8 = 54^8 = 27^4
y = dy^d = -63^-8 = 63^8
(x,y) = (27^4, 63^8)
Step-by-step explanation:
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