Find the following product using suitable identities. Mention the
identities used
i) Square of (x+0.09)
ii) (0.2+0.3)(0.2−0.3)
iii)(2z²-9)(2z²+6)
iv) 10.5×9.5
v) 104²
vi)999²
vii) 61²-60²
viii) 113×102
plz don't spam answer with full steps plz solve these
Answers
Answer:
question
(a + b)2 = a2 + 2ab + b2
(a – b)2 = a2 – 2ab + b2
(a – b)(a + b) = a2 – b2
1) This question can be solved using the first identify
(x + 3) (x + 3)
=x2 + 6x + 9
2) This question can be solved using the first identify
(2y + 5) (2y + 5)
=4y2 + 20y + 25
3) This question can be solved using the second identify
(2a – 7) (2a – 7)
= 4a2 – 28a + 49
4) This question can be solved using the second identify
(3a-1/2)(3a-1/2)= 9a2 -3a+(1/4)
5) This question can be solved using the third identity
(1.1m – 0.4) (1.1m + 0.4)
= 1.21m2 – 0.16
5) This question can be solved using the third identity
(a2+ b2) (– a2+ b2)
= (b2 + a2 ) (b2 – a2)
= a4 - b4
6) This question can be solved using the third identity
(6x – 7) (6x + 7)
=36x2 - 49
7) This question can be solved using the third identity
= c2 - a2
8) This question can be solved using the first identity
[ (x/2)+(3y/4)] [ (x/2)+(3y/4)]
=(x2/4) + (9y2/16) +(3xy/4)
9) This question can be solved using second identity
= 49a2 – 126ab + 81b2
Answer:
Answer:
question
(a + b)2 = a2 + 2ab + b2
(a – b)2 = a2 – 2ab + b2
(a – b)(a + b) = a2 – b2
1) This question can be solved using the first identify
(x + 3) (x + 3)
=x2 + 6x + 9
2) This question can be solved using the first identify
(2y + 5) (2y + 5)
=4y2 + 20y + 25
3) This question can be solved using the second identify
(2a – 7) (2a – 7)
= 4a2 – 28a + 49
4) This question can be solved using the second identify
(3a-1/2)(3a-1/2)= 9a2 -3a+(1/4)
5) This question can be solved using the third identity
(1.1m – 0.4) (1.1m + 0.4)
= 1.21m2 – 0.16
5) This question can be solved using the third identity
(a2+ b2) (– a2+ b2)
= (b2 + a2 ) (b2 – a2)
= a4 - b4
6) This question can be solved using the third identity
(6x – 7) (6x + 7)
=36x2 - 49
7) This question can be solved using the third identity
= c2 - a2
8) This question can be solved using the first identity
[ (x/2)+(3y/4)] [ (x/2)+(3y/4)]
=(x2/4) + (9y2/16) +(3xy/4)
9) This question can be solved using second identity
= 49a2 – 126ab + 81b2