Advertisements
Advertisements
प्रश्न
Find the following product: (x + 7) (x − 5)
Advertisements
उत्तर
Here, we will use the identity \[\left( x + a \right)\left( x - b \right) = x^2 + \left( a - b \right)x - ab\].
\[\left( x + 7 \right)\left( x - 5 \right)\]
\[ = x^2 + \left( 7 - 5 \right)x - 7 \times 5\]
\[ = x^2 + 2x - 35\]
APPEARS IN
संबंधित प्रश्न
If 2x + 3y = 14 and 2x − 3y = 2, find the value of xy.
[Hint: Use (2x + 3y)2 − (2x − 3y)2 = 24xy]
Find the following product: (x2 + 4) (x2 + 9)
Evaluate the following: 53 × 55
On dividing p(4p2 – 16) by 4p(p – 2), we get ______.
Multiply the following:
(3x2 + 4x – 8), (2x2 – 4x + 3)
Simplify:
`(7/9 a + 9/7 b)^2 - ab`
Simplify:
(ab – c)2 + 2abc
Expand the following, using suitable identities.
(7x + 5)2
Using suitable identities, evaluate the following.
(49)2
Carry out the following division:
76x3yz3 ÷ 19x2y2
