Question

7x^2 - 39x - 70 please factorise it..​

Answer 1

Answer:

7*7*5*3*7*7*2*3

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

$7 {x}^{2} - 39x - 70 = 0$

$7 {x}^{2} - (49 - 10)x - 70 = 0$

$7 {x}^{2} - 49x + 10x - 70 = 0$

$7x(x - 7) + 10(x - 7) = 0$

$(x - 7)(7x + 10) = 0$

If

$x - 7 = 0$

$x = 7$

OR

$7x + 10 = 0$

$7x = - 10$

$x = - \frac{10}{7}$

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