Use suitable iden

(i) (x + 4) (x + 10)

Using identity,

(x + a) (x + b) = x2 + (a + b)x + ab

In (x + 4) (x + 10), a = 4 and b = 10

Now,

(x + 4) (x + 10) = x2 + (4 + 10)x + (4 × 10)

= x2 + 14x + 40

(ii) (x + 8) (x - 10)

Using identity,

(x + a) (x + b) = x2 + (a + b) x + ab

Here, a = 8 and b = -10

(x + 8) (x – 10) = x2 + {8 + (-10)} x + {8 × (-10)}

= x2 + (8 – 10)x – 80

= x2 – 2x – 80

(iii) (3x + 4) (3x - 5)

Using identity,

(x + a) (x + b) = x2 + (a + b) x + ab

Here, x = 3x, a = 4 and b = -5

(3x + 4) (3x – 5) = (3x)2 + {4 + (-5)} 3x + {4 × (-5)}

= 9x2 + 3x (4 – 5) – 20

= 9x2 – 3x – 20

(iv) Using identity,

(x + y) (x – y) = x2 – y2

Here, x = y2 and y =   (v) (3 - 2x) (3 + 2x)

Using identity,

(x + y) (x – y) = x2 – y2

Here, x = 3 and y = 2x

(3 – 2x) (3 + 2x) = 32 – (2x)2

= 9 – 4x2

Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation view all courses RELATED QUESTIONS :

75×75+2×RD Sharma - Mathematics

If x+<span lang="RD Sharma - Mathematics

Factorize:
</p
RS Aggarwal & V Aggarwal - Mathematics

Factorize:
</p
RS Aggarwal & V Aggarwal - Mathematics

Factorize:
</p
RS Aggarwal & V Aggarwal - Mathematics

Factorize:
</p
RS Aggarwal & V Aggarwal - Mathematics

If a1RD Sharma - Mathematics

Factorize:
</p
RS Aggarwal & V Aggarwal - Mathematics

Factorize:
</p
RS Aggarwal & V Aggarwal - Mathematics

Factorize:
</p
RS Aggarwal & V Aggarwal - Mathematics