Question

question 3: find the product of (x-7) (x-9)
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Answer 1

$x {}^{2} - (7 - 9x )- 7 \times 9 \\x {}^{2} - 16x - 63$

Answer 2

Answer:

x²-16x+63

Step-by-step explanation:

= (x-7)(x-9)

1. multiply first number of first closed bracket which is a variable"X"to the the first number a variable "X" of second closed bracket. we will get x². in the same way multiple X to second number Which is 9 then we will get -9x. As X is positive and 9 is negative so answer will be negative.
2. in the same way then multiply -7 to X we will get -7x. then multiply-7 into -9 so answer would be positive as +63.

=x²- 9x-7x+63

1. now add -9x to -7x we will get -16x

=x²-16+63( answer)