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1. Use a suitable identity to get each of the following products.(vi) (a- + b2) (- a² + b2) (vii) (6x - 7).(6x + 7)EXERCISE 9.512(ii) (2y + 5) (2y + 5)(1) (x + 3) (x + 3)(iii) (2a – 7) (2a - 7)3a-) (3a-(iv) (3a -(v) (1.1m - 0.4) (1.1m +0.4)(viii) (-a+c) (-a + c)3yx 3y+p)х+4(x) (7a - 9b) (7a-9b)(ix)4i arん)_2​

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