Question

x*x + 13x + 42
solve this and get 50 point ​

Answer 1

Step-by-step explanation:

$\huge\mathtt\blue{\underline{\underline{\dag AnSwEr \dag}}}$

$\large\mathtt\green{\underline{\underline{\dag SoLuTiOn \dag}}}$

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$\mathtt{●(x-7)\ (x-6)●}$

$\large\mathtt\red{\underline{\underline{\dag Explanation \dag}}}$

$\bold{>>}$ x2 - 13x + 42 = (x+a)(x+b)

 

You want two numbers, a and b, that multiply to give 42 (a*b = 42) and add to give -13 (a+b = -13).  Since the numbers must add to give a negative number and multiply to give a positive number, they most both be negative.  Let's try some factors of 42:

 

-21 * -2 = 42           -21 + -2 = -23

-14 * -3 = 42           -14 + -3 = -17

-13 * -4 = 42           -13 + -4 = -17

 -7 * -6 = 42           -7 + -6 = -13  So this is the answer!

 

x2 - 13x + 42 = (x-7)(x-6)

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$\large\mathtt\purple{\underline{\underline{\dag That's\ Solve \dag}}}$

$\large\mathtt\orange{\underline{\underline{\dag Hope\ It\ Helps\ You \dag}}}$

Answer 2

Step-by-step explanation:

-21 * -2 = 42 -21 + -2 = -23

-14 * -3 = 42 -14 + -3 = -17

-13 * -4 = 42 -13 + -4 = -17

-7 * -6 = 42 -7 + -6 = -13 So this is the answer!

x2 - 13x + 42 = (x-7)(x-6)