Question

Question 2: Use the identity (x + a)(x + b) = x ^ 2 + (a + b) * x + ab to find the following products.
(i) (x+3)(x + 7)
(ii) (4x+5) (4x + 1)
(iii) (4x - 5) (4x - 1)
(iv) (4x + 5) (4x - 1)
(v) (2x +5y) (2x + 3y)
(vi) (2a² +9) (2a²+5)
(vii) (xyz - 4) (xyz - 2)​

Answer 1

Answer:

i) x²+2(3×7) x+3×7

= x²+42×x+21

=x²+42x+21

ii)(4x)²+2(5×1)4x+5×1

= 16x²+10×4x+5

=16x²+40x+5

Step-by-step explanation:

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