Find the value of a and b so that the pair of values (2, -3) is a solution of the system
2 answers:
X = 2 y =-3 Plug these values in;-
2 - 3b = 5
2a + 9 = -1
from first equation -3b = 3 so b = -1
from second equation
2a = -10 so a = -5
Since (2, -3) is a solution, that means x = 2 and y = -3 would satisfy the equations.
x + by = 5 Ax - 3y = -1
2 + b*-3 = 5 A*2 - 3*-3 = -1
2 - 3b =5 2A + 9 = -1
-3b = 5 - 2 2A = -1 - 9
-3b = 3 2A = -10
b = 3/-3 A = -10/2
b = -1 A = -5
b = -1 and A = -5
Hope this helps.
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Answer:
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<span>–3cd – d(2c – 4) – 4d
= </span><span>–3cd – 2cd + 4d – 4d
= -5cd
answer
</span><span>A:–5cd </span>