Question

1. Using identities, simplify the following: (a) (x + 3)(x + 1) (b) (y + 5)(y - 3) (d) (x² - 4) (x² + 3) (e) (a - 5)(a - 6)






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Answer 1

Answer:

a)(x+3)(x+1)

x^2+(3+1)x+3×1. (using identity four)

x^2+4x+3

b)(y+5)(y-3)

y^2+[5+(-3)]y+5×-3

y^2+2y-15

Others can also be solve by the same formula

Answer 2

Answer:

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