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Find the product using the identity
(x + a) (x + b) = x² + (a+b)x+ ab.
a. (2x - 7y) (2x + 8y)
b. 103 x 95
c. 505 x 502
d. (5p -7q) (5p - 7q)
Types of contact force: Frictional Force: Friction is a force exerted by a surface against the motion of a body across its surface. ... Friction is a type of contact force only. Applied Force: Force which is applied to an object by another object.Nov 16, 2020
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