h(a)
answer= 2a^2-3
2007-11-21 09:16:27 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
also question says find h(3x+2)
2007-11-21 09:17:28 · update #1
h(a) means substitute a for x in the eq
hence 2a^2 - 3
2007-11-21 09:20:49 · answer #1 · answered by norman 7 · 0⤊ 0⤋
this is simple.....h(x)=2x^2-3 simply means there is a functino called "h" and that it is written in terms of "x", where x is a variable and can be any number. so h(a) simply means they want a to equal x so wherever there is an x subsittue an a in there hence getting the answer. so for h(3x+2) the answer would just be
2(3x+2)^2-3
2007-11-21 17:22:12 · answer #2 · answered by dhh 2 · 0⤊ 0⤋
Find h(3x+2) when h(x) = 2x^2 - 3
*Substitute 3x+2 with "x" in the function.
h(3x+2) = 2(3x+2)^2 - 3
= 2(3x+2)(3x+2) - 3
First: eliminate parenthesis - use the Foil method.
= 2(3x)(3x)+(3x)(2)+(2)(3x)+(2)(2) - 3
= 2(9x^2)+6x+6x+4 - 3
= 18x^2 +6x+6x+4 - 3
= 18x^2+12x+1
2007-11-22 02:13:58 · answer #3 · answered by ♪♥Annie♥♪ 6 · 0⤊ 0⤋
you were correct that h(a)=2a^2 -3
to get this, you substitute a for x.
to find h(3x+2) substitute 3x+2 for x
h(x)=2x^2-3
=2(3x+2)^2-3
=2(3x+2)(3x+2)-3
=2(9x^2+6x+6x+4)-3
=2(9x^2+12x+4)-3
=18x^2+24x+8-3
=18x^2+24x+5
2007-11-21 18:07:06 · answer #4 · answered by Valerie 1 · 0⤊ 1⤋
h(3x+2) = 2(3x+2)(3x+2) - 3
= 2(9x^2 + 12x + 4) - 3
= 18x^2 + 12x + 1
Hope this helps! :)
2007-11-21 17:23:41 · answer #5 · answered by disposable_hero_too 6 · 0⤊ 0⤋
h(x), want to find h(a)
h(x) = h(a) or: x = a
h(a) = 2a^2 - 3
2007-11-21 17:25:57 · answer #6 · answered by Anonymous · 0⤊ 0⤋