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Factorize: 9(2a – b)^2 – 4(2a – b)
1 answer:
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The straight line joining the points A(3,-5) and B(6,k) has a gradient of 4.
Gradient is the slope
So the slope of the line joining the points A(3,-5) and B(6,k) is 4
Slope of line joining two points =
A(3,-5) and B(6,k) are (x1,y1) and (x2,y2)
slope =
slope =
We know slope =4
Cross multiply and solve for k
k + 5 = 12
k = 7
The value of k = 7
Suppose you can factorize:
Then by expanding the right side, you have
which means in this case, you have to have
Then by expanding the right side, you have
which means in this case, you have to have