A(b+c) = (ab + ac)
Use the formula: (a + b)(a − b) = a² − b²
Here, a = 3x and b = 2
= (3x)² − (2)²
= 9x² − 4
For the point (a,−a):
x=a,y=−a
Therefore:
y=−x
Last updated 27-07-2026 by NA
Given:
Write the terms as:
Using the formula:
For n=10:
Last updated 27-07-2026 by NA
Using the identity:
x2−y2=(x+y)(x−y)=16×3
=48
If y is directly proportional to x, then:
y = kx, where k is the constant of proportionality
Given x = 2, y = 5:
5 = k _ 2
k = 5/2
Now find y when x = 7:
y = (5/2) _ 7
y = 35/2
Last verified on 28-07-2026
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