exam Maths Puzzle Numerical Ability

factor the following :

1) x2 � 16x + 63
2) 4x2 + 34x + 42
3) 16x2 + 40x + 25

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exam Other Question

how do you find f(x)=ax+b in which f(2)=1 and f(-3(=11?
from mathematics for the international student:Mathematics SL-section 1c I am thinking of three consecutive positive numbers. If i multiply the first with the third and then add the second, the result is 41. Let x be the smallest number.