exam Maths Puzzle Numerical Ability

What does a binomial multiplied by a binomial look like? Is it something like this (2x+9)(3x-9)? How doI solve this type of problem? Please help, thank you

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exam Other Question

the units digit of a two digit number is 3 less than its tens digit. if the number is divided by the sum of its digits, the qoutient is 6 and the remainder is 8. find the number? can someone please help graphs are my weakness
PLOT THE POINT WITH COORDINATES OF (-4,0)

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