7x^2 - 39x - 70 please factorise it..
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7x^2 - 39x - 70 please factorise it..
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Answer:
7*7*5*3*7*7*2*3
Step-by-step explanation:
hope this is the answer
fol low mee
Verified answer
Step-by-step explanation:
[tex]7 {x}^{2} - 39x - 70 = 0[/tex]
[tex]7 {x}^{2} - (49 - 10)x - 70 = 0[/tex]
[tex]7 {x}^{2} - 49x + 10x - 70 = 0[/tex]
[tex]7x(x - 7) + 10(x - 7) = 0[/tex]
[tex](x - 7)(7x + 10) = 0[/tex]
If
[tex]x - 7 = 0[/tex]
[tex]x = 7[/tex]
OR
[tex]7x + 10 = 0[/tex]
[tex]7x = - 10[/tex]
[tex]x = - \frac{10}{7} [/tex]