Question

tity (x + a) (x + b) = x + (a + b) x + ab to find the
following
(1) 501 x 502
Solution:
(0)
(i) 95 x 103
501 502 = (500 + 1) (500 + 2) = 500 + (1 + 2) 500 + 1x2
= 250000 + 1500 + 2 = 251502
95 x 103 = (100 – 5) x (100 + 3) = 100- + (-5 + 3) x 100 + (-5)*3
= 10000 - 200 - 15 =9785
EXERCISE 9.5
1. Use a suitable identity to get each of the following products
(ii) (2y + 5) (2y + 5) (iii) (2a - 7) (20 - 7)
() (x+3)(x + 3)
1
2) (3a-
(iv)
(3a -
(v) (1.Im - 0.4) (1.1m +0.4)
(vi) (a² +6²) (- a² +6²) (vii) (6x-7) (6x +7 (vii) (-a + c) (-a't
r31
x
(x) (79-9b) (70 - 9b)
24 2 4
Use the identity (+a) (r+b)=r+(a+b)x+ ab to find the following prod
It
(ii) (4x + 5) (4x + 1)​

Answer 1

Answer:

oh my god it goes over my head