Question

Simplify (5x+3)(5x+4)by using (x+a) (x+b) identity​

Answer 1

Step-by-step explanation:

$(x + a)(x + b) = 0 \\ (5x + 3)(5x + 4) = 0 \\ 5x(5x + 4) + 3(5x + 4) = 0 \\ 25 {x}^{2} + 20x + 15x + 12 = 0 \\ 25 {x}^{2} + 35x + 12 = 0$

Answer 2

Answer:

25x²+7x+12

Step-by-step explanation:

Identity: (x+a)(x+b)=x²+(a+b)x+ ab

(5x+3)(5x+4)

(5x)²+(3+4)x+(3×4)

25x²+7x+12

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