Question

ba
[Taking x - y = a]
(Splitting the middle term
= 7+ 14a-4a-8a2
= 7(1 + 2a) - 4a(1 + 2a)
= (1 + 2a)(
7-4a)
= (1 + 2(x - y)]17 - 4(x - y)]
(1 + 2x - 2y)(7 - 4x + 4y)
Factorise
y x2 + 6x + 8
3. a? + 5a + 6
8. a² + 5a - 6
7. a? - 3a - 40
(Substituting a = X-y)
(Ans.)
EXERCISE 13(D)
15. 4c² + 30-10
16. 14x2 + x-3
2. *² + 4x + 3
11. 6+ 76 - 362
18. 5+7X-6X2
4. a2-5a + 6
19. 4 + y - 14y2
20. 5 + 3a - 14a2
6. x2 + 5xy + 4y2 21. (2a + b)2 + 5(2a + b) + 6
8. x2-x-72
22. 1-(2x + 3y) - 6(2x + 3y)2
9. x2 - 10xy + 24y2 10. 2a2 + 7a +6 23. (x-2y)2 - 12(x - 2y) +32
11. 3a2-5a + 2 12. 7b2-8b + 1
24. 8 + 6(a + b) - 5(a + b)2
18 222 - 17ab +26b2 14. 2x2 + xy - 6y2 25. 2(x + 2y)2 - 5(x + 2y) + 2
13.7 FACTORISING A PERFECT SQUARE TRINOMIAL
Square of a binomial is called a perfect square trinomial.एक्स एक्स पावर 2 प्लस 6 एक्स प्लस 8 ​

Answer 1

Answer:

This is a very long process Sorry