Question

Q - 2 Solve the following according to the given instructions
Evaluate using suitableldentities.
1. (2a + 7) (2a-7)
2..
(b - 7)?
1. 512 - 492
Using Identities, Evaluate the following:
2. 103 X 104​

Answer 1

Answer:

1)

${a}^{2} - {b}^{2} = (a + b)(a - b)$

${4a}^{2} - 49$

2.1) {(500+12)+(-500+8)}=20

2)(100+3)×(100+4)

$(x + a)(x + b) = {x}^{2} + (a + b)x + ab \\ = {100}^{2} + (3 + 4)100 + 3 \times 4 \\ = 10000 + 700 + 12 \\ = 10712$

Answer 2

Step-by-step explanation:

the upper answer it is correct plz mark it as brainlist