Advertisements
Advertisements
Question
Find the following product: (x + 4) (x + 7)
Advertisements
Solution
Here, we will use the identity
\[\left( x + a \right)\left( x + b \right) = x^2 + \left( a + b \right)x + ab .\]
\[\left( x + 4 \right)\left( x + 7 \right)\]
\[ = x^2 + \left( 4 + 7 \right)x + 4 \times 7\]
\[ = x^2 + 11x + 28\]
APPEARS IN
RELATED QUESTIONS
Simplify the following using the identities: \[\frac{{58}^2 - {42}^2}{16}\]
Find the following product: (3x2 − 4xy) (3x2 − 3xy)
Find the following product: (x2 + 4) (x2 + 9)
Expand the following:
(2x + 3y + 4z)2
Expand the following:
(−p + 2q + 3r)2
Simplify:
(4.5a + 1.5b)2 + (4.5b + 1.5a)2
Expand the following, using suitable identities.
`(4/5a + 5/4b)^2`
Expand the following, using suitable identities.
`((2a)/3 + b/3)((2a)/3 - b/3)`
Using suitable identities, evaluate the following.
(52)2
Using suitable identities, evaluate the following.
(49)2
