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
Find the value of x, if 5x = (50)2 − (40)2.
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: (y2 − 4) (y2 − 3)
Find the following product: (z2 + 2) (z2 − 3)
Find the following product: \[\left( y^2 + \frac{5}{7} \right)\left( y^2 - \frac{14}{5} \right)\]
Simplify:
(ab – c)2 + 2abc
Simplify:
(a – b) (a2 + b2 + ab) – (a + b) (a2 + b2 – ab)
Simplify:
(s2t + tq2)2 – (2stq)2
Expand the following, using suitable identities.
(a2 + b2)2
Carry out the following division:
17ab2c3 ÷ (–abc2)
